FastIron Ethernet Switch Layer 3 Routing Configuration ...noc.ucsc.edu/docs/BigCreek/fastiron-08030r-manuals/fastiron-08030mb-l3guide.pdfSupporting FastIron Software Release 08.0.30mb

Supporting FastIron Software Release 08.0.30mb

CONFIGURATION GUIDE

FastIron Ethernet Switch Layer 3 RoutingConfiguration Guide, 08.0.30mb

Part Number: 53-1003627-08Publication Date: 09 February 2018

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FastIron Ethernet Switch Layer 3 Routing Configuration Guide, 08.0.30mb2 Part Number: 53-1003627-08

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FastIron Ethernet Switch Layer 3 Routing Configuration Guide, 08.0.30mbPart Number: 53-1003627-08 3

ContentsPreface........................................................................................................................................................................................................17

Document Conventions........................................................................................................................................................................17Notes, Cautions, and Warnings.....................................................................................................................................................17

Command Syntax Conventions............................................................................................................................................................17Document Feedback............................................................................................................................................................................18Ruckus Product Documentation Resources......................................................................................................................................... 18Online Training Resources.................................................................................................................................................................... 18Contacting Ruckus Customer Services and Support............................................................................................................................19

What Support Do I Need?.............................................................................................................................................................19Open a Case.................................................................................................................................................................................19Self-Service Resources................................................................................................................................................................. 19

About This Document..................................................................................................................................................................................21Supported hardware and software....................................................................................................................................................... 21What’s new in this document................................................................................................................................................................21

IP Configuration...........................................................................................................................................................................................23Basic IP configuration...........................................................................................................................................................................23IP configuration overview......................................................................................................................................................................23

Full Layer 3 support...................................................................................................................................................................... 23IP interfaces..................................................................................................................................................................................24IP packet flow through a Layer 3 switch........................................................................................................................................25IP route exchange protocols......................................................................................................................................................... 28IP multicast protocols....................................................................................................................................................................29IP interface redundancy protocols................................................................................................................................................. 29ACLs and IP access policies......................................................................................................................................................... 29

Basic IP parameters and defaults - Layer 3 switches............................................................................................................................30When parameter changes take effect............................................................................................................................................30IP global parameters - Layer 3 switches........................................................................................................................................30IP interface parameters - Layer 3 switches....................................................................................................................................34

Basic IP parameters and defaults - Layer 2 switches............................................................................................................................35IP global parameters - Layer 2 switches........................................................................................................................................35Interface IP parameters - Layer 2 switches....................................................................................................................................37

Configuring IP parameters - Layer 3 switches...................................................................................................................................... 37Configuring IP addresses.............................................................................................................................................................. 37Configuring 31-bit subnet masks on point-to-point networks........................................................................................................ 40Configuring DNS resolver.............................................................................................................................................................. 42Configuring packet parameters..................................................................................................................................................... 45Changing the router ID..................................................................................................................................................................48Specifying a single source interface for specified packet types......................................................................................................49Configuring delay time for notifying VE down event....................................................................................................................... 52ARP parameter configuration........................................................................................................................................................ 53Configuring forwarding parameters............................................................................................................................................... 59Disabling ICMP messages.............................................................................................................................................................61Enabling ICMP redirect messages.................................................................................................................................................62Static routes configuration............................................................................................................................................................ 63Configuring a default network route...............................................................................................................................................71


Configuring IP load sharing........................................................................................................................................................... 72ECMP load sharing for IPv6.......................................................................................................................................................... 75ICMP Router Discovery Protocol configuration.............................................................................................................................. 77IRDP parameters.......................................................................................................................................................................... 77Reverse Address Resolution Protocol configuration...................................................................................................................... 78Configuring UDP broadcast and IP helper parameters.................................................................................................................. 80BootP and DHCP relay parameter configuration............................................................................................................................82DHCP server.................................................................................................................................................................................84Displaying DHCP server information..............................................................................................................................................94

Configuring IP parameters - Layer 2 switches...................................................................................................................................... 96Configuring the management IP address and specifying the default gateway................................................................................ 96Configuring Domain Name System resolver.................................................................................................................................. 97Changing the TTL threshold.......................................................................................................................................................... 99DHCP Assist configuration............................................................................................................................................................ 99

IPv4 point-to-point GRE tunnels ........................................................................................................................................................103IPv4 GRE tunnel overview........................................................................................................................................................... 103GRE packet structure and header format.................................................................................................................................... 104Path MTU Discovery support...................................................................................................................................................... 104Configuration considerations for PMTUD support .......................................................................................................................105Tunnel loopback ports for GRE tunnels....................................................................................................................................... 105Support for IPv4 multicast routing over GRE tunnels................................................................................................................... 106GRE support with other features ................................................................................................................................................ 106Configuration considerations for GRE IP tunnels......................................................................................................................... 107Configuration tasks for GRE tunnels............................................................................................................................................108Example point-to-point GRE tunnel configuration........................................................................................................................116Displaying GRE tunneling information..........................................................................................................................................117Clearing GRE statistics................................................................................................................................................................121

Bandwidth for IP interfaces................................................................................................................................................................ 122Limitations and pre-requisites......................................................................................................................................................123OSPF cost calculation with interface bandwidth..........................................................................................................................123Setting the bandwidth value for an Ethernet interface..................................................................................................................123Setting the bandwidth value for a VE interface.............................................................................................................................124Setting the bandwidth value for a tunnel interface....................................................................................................................... 124

Displaying IP configuration information and statistics..........................................................................................................................125Changing the network mask display to prefix format................................................................................................................... 125Displaying IP information - Layer 3 switches................................................................................................................................125Displaying IP information - Layer 2 switches................................................................................................................................137

Disabling IP checksum check.............................................................................................................................................................140

Layer 3 Routing Protocols......................................................................................................................................................................... 143Adding a static IP route...................................................................................................................................................................... 143

Configuring a "null" route.............................................................................................................................................................144Static route next hop resolution...................................................................................................................................................144Static route recursive lookup....................................................................................................................................................... 145Static route resolve by default route............................................................................................................................................ 145

Adding a static ARP entry.................................................................................................................................................................. 146Modifying and displaying Layer 3 system parameter limits..................................................................................................................146

Layer 3 configuration notes.........................................................................................................................................................146FastIron second generation modules...........................................................................................................................................146FastIron third generation modules............................................................................................................................................... 147Displaying Layer 3 system parameter limits................................................................................................................................. 147


Enabling or disabling routing protocols............................................................................................................................................... 147Enabling or disabling Layer 2 switching.............................................................................................................................................. 148

Configuration notes and feature limitations for Layer 2 switching.................................................................................................148Command syntax for Layer 2 switching.......................................................................................................................................148

Configuring a Layer 3 Link Aggregration Group (LAG).........................................................................................................................149

IPv6 Configuration on FastIron X Series, FCX, and ICX Series Switches.....................................................................................................151Full Layer 3 IPv6 feature support........................................................................................................................................................ 151IPv6 addressing overview...................................................................................................................................................................152

IPv6 address types..................................................................................................................................................................... 152IPv6 stateless auto-configuration................................................................................................................................................ 154

IPv6 CLI command support .............................................................................................................................................................. 154IPv6 host address on a Layer 2 switch............................................................................................................................................... 157

Configuring a global or site-local IPv6 address with a manually configured interface ID................................................................157Configuring a link-local IPv6 address as a system-wide address for a switch.............................................................................. 157

Configuring the management port for an IPv6 automatic address configuration..................................................................................158Configuring basic IPv6 connectivity on a Layer 3 switch..................................................................................................................... 158

Enabling IPv6 routing.................................................................................................................................................................. 158IPv6 configuration on each router interface................................................................................................................................. 158Configuring IPv4 and IPv6 protocol stacks.................................................................................................................................. 161

IPv6 management (IPv6 host support)................................................................................................................................................162Configuring IPv6 management ACLs...........................................................................................................................................162Restricting SNMP access to an IPv6 node.................................................................................................................................. 162Specifying an IPv6 SNMP trap receiver....................................................................................................................................... 163Configuring SNMP V3 over IPv6..................................................................................................................................................163Secure Shell, SCP, and IPv6........................................................................................................................................................163IPv6 Telnet.................................................................................................................................................................................. 163IPv6 traceroute........................................................................................................................................................................... 164IPv6 Web management using HTTP and HTTPS.........................................................................................................................164Restricting Web management access......................................................................................................................................... 165Restricting Web management access by specifying an IPv6 ACL................................................................................................165Restricting Web management access to an IPv6 host.................................................................................................................165Configuring name-to-IPv6 address resolution using IPv6 DNS resolver........................................................................................165Defining an IPv6 DNS entry......................................................................................................................................................... 165Pinging an IPv6 address..............................................................................................................................................................166Configuring an IPv6 Syslog server............................................................................................................................................... 167Viewing IPv6 SNMP server addresses.........................................................................................................................................167Disabling router advertisement and solicitation messages........................................................................................................... 168Disabling IPv6 on a Layer 2 switch.............................................................................................................................................. 168

IPv6 ICMP feature configuration......................................................................................................................................................... 168Configuring ICMP rate limiting..................................................................................................................................................... 168Enabling IPv6 ICMP redirect messages....................................................................................................................................... 169

IPv6 neighbor discovery configuration................................................................................................................................................ 170IPv6 neighbor discovery configuration notes............................................................................................................................... 170Neighbor solicitation and advertisement messages..................................................................................................................... 170Router advertisement and solicitation messages.........................................................................................................................171Neighbor redirect messages....................................................................................................................................................... 171Setting neighbor solicitation parameters for duplicate address detection.....................................................................................171Setting IPv6 router advertisement parameters.............................................................................................................................172Prefixes advertised in IPv6 router advertisement messages.........................................................................................................173Setting flags in IPv6 router advertisement messages...................................................................................................................174


Enabling and disabling IPv6 router advertisements......................................................................................................................174IPv6 router advertisement preference support............................................................................................................................. 175Configuring reachable time for remote IPv6 nodes...................................................................................................................... 175

IPv6 MTU...........................................................................................................................................................................................176Configuration notes and feature limitations for IPv6 MTU.............................................................................................................176Changing the IPv6 MTU.............................................................................................................................................................. 176

Static neighbor entries configuration.................................................................................................................................................. 176Limiting the number of hops an IPv6 packet can traverse...................................................................................................................177IPv6 source routing security enhancements........................................................................................................................................177TCAM space on FCX device configuration......................................................................................................................................... 178

Allocating TCAM space for IPv4 routing information.................................................................................................................... 178Allocating TCAM space for GRE tunnel information.....................................................................................................................178

Clearing global IPv6 information......................................................................................................................................................... 178Clearing the IPv6 cache.............................................................................................................................................................. 179Clearing IPv6 neighbor information..............................................................................................................................................179Clearing IPv6 routes from the IPv6 route table.............................................................................................................................179Clearing IPv6 traffic statistics.......................................................................................................................................................180

Displaying global IPv6 information...................................................................................................................................................... 180Displaying IPv6 cache information...............................................................................................................................................180Displaying IPv6 interface information........................................................................................................................................... 181Displaying IPv6 neighbor information...........................................................................................................................................183Displaying the IPv6 route table ................................................................................................................................................... 184Displaying local IPv6 routers........................................................................................................................................................185Displaying IPv6 TCP information..................................................................................................................................................186Displaying IPv6 traffic statistics....................................................................................................................................................188

DHCP relay agent for IPv6..................................................................................................................................................................191Configuring DHCP for IPv6 relay agent........................................................................................................................................191Enabling the interface-ID on the DHCPv6 relay agent messages................................................................................................. 192Displaying DHCPv6 relay agent information.................................................................................................................................192Displaying the DHCPv6 Relay configured destinations.................................................................................................................192Displaying the DHCPv6 Relay information for an interface........................................................................................................... 193

DHCPv6 Relay Agent Prefix Delegation Notification............................................................................................................................193DHCPv6 Relay Agent Prefix Delegation Notification limitations.................................................................................................... 194Upgrade and downgrade considerations.....................................................................................................................................195Configuring DHCPv6 Relay Agent Prefix Delegation Notification.................................................................................................. 195Displaying the DHCPv6 Relay Agent Prefix Delegation Notification information............................................................................196

RIP............................................................................................................................................................................................................201RIP overview...................................................................................................................................................................................... 201RIP parameters and defaults.............................................................................................................................................................. 201

RIP global parameters.................................................................................................................................................................201RIP interface parameters.............................................................................................................................................................203

Configuring RIP parameters............................................................................................................................................................... 203Enabling RIP............................................................................................................................................................................... 203Configuring route costs...............................................................................................................................................................204Changing the administrative distance..........................................................................................................................................204Configuring redistribution............................................................................................................................................................ 204Configuring route learning and advertising parameters................................................................................................................ 206Changing the route loop prevention method................................................................................................................................207Suppressing RIP route advertisement on a VRRP or VRRPE backup interface............................................................................ 208Configuring RIP route filters using prefix-lists and route maps......................................................................................................208


Setting RIP timers....................................................................................................................................................................... 209Displaying RIP Information..................................................................................................................................................................210Displaying CPU utilization statistics.....................................................................................................................................................212

RIPng........................................................................................................................................................................................................213RIPng Overview..................................................................................................................................................................................213Configuring RIPng.............................................................................................................................................................................. 213

Enabling RIPng........................................................................................................................................................................... 213Configuring RIPng timers............................................................................................................................................................ 214Configuring route learning and advertising parameters................................................................................................................ 215Redistributing routes into RIPng.................................................................................................................................................. 216Controlling distribution of routes through RIPng...........................................................................................................................217Configuring poison reverse parameters....................................................................................................................................... 217

Clearing RIPng routes from IPv6 route table....................................................................................................................................... 218Displaying RIPng information..............................................................................................................................................................218

Displaying RIPng configuration....................................................................................................................................................218Displaying RIPng routing table.....................................................................................................................................................219

OSPFv2.....................................................................................................................................................................................................221OSPF overview.................................................................................................................................................................................. 221OSPF point-to-point links................................................................................................................................................................... 223Designated routers in multi-access networks..................................................................................................................................... 223Designated router election in multi-access networks.......................................................................................................................... 223OSPF RFC 1583 and 2328 compliance............................................................................................................................................. 225Reduction of equivalent AS external LSAs..........................................................................................................................................225

Algorithm for AS external LSA reduction......................................................................................................................................227Support for OSPF RFC 2328 Appendix E...........................................................................................................................................227OSPF graceful restart.........................................................................................................................................................................228

OSPF stub router advertisement................................................................................................................................................. 228OSPF Shortest Path First throttling..............................................................................................................................................229IETF RFC and internet draft support............................................................................................................................................229Dynamic OSPF activation and configuration................................................................................................................................229

Configuring OSPF.............................................................................................................................................................................. 230Configuration rules...................................................................................................................................................................... 230OSPF parameters....................................................................................................................................................................... 230Enable OSPF on the device........................................................................................................................................................ 231Assign OSPF areas..................................................................................................................................................................... 232Assign a totally stubby area.........................................................................................................................................................233Assigning an area range (optional) ..............................................................................................................................................236Assigning an area cost (optional parameter) ............................................................................................................................... 236Assigning interfaces to an area....................................................................................................................................................237Setting all OSPFv2 interfaces to the passive state....................................................................................................................... 237Modify interface defaults............................................................................................................................................................. 238Changing the timer for OSPF authentication changes................................................................................................................. 240Block flooding of outbound LSAs on specific OSPF interfaces.................................................................................................... 241Assign virtual links.......................................................................................................................................................................241Modify virtual link parameters...................................................................................................................................................... 243Changing the reference bandwidth for the cost on OSPF interfaces............................................................................................ 244Define redistribution filters........................................................................................................................................................... 246Modify default metric for redistribution.........................................................................................................................................248Enable route redistribution...........................................................................................................................................................248


Disable or re-enable load sharing................................................................................................................................................ 249Configure external route summarization...................................................................................................................................... 251Configure default route origination...............................................................................................................................................252Supported match and set conditions.......................................................................................................................................... 253

OSPF non-stop routing...................................................................................................................................................................... 254Synchronization of critical OSPF elements..........................................................................................................................................254

Link state database synchronization............................................................................................................................................254Neighbor router synchronization..................................................................................................................................................255Interface synchronization.............................................................................................................................................................255

Standby module operations............................................................................................................................................................... 255Neighbor database..................................................................................................................................................................... 256LSA database............................................................................................................................................................................. 256

Enabling and disabling NSR............................................................................................................................................................... 256Limitations of NSR...................................................................................................................................................................... 256

Disabling configuration....................................................................................................................................................................... 257OSPF distribute list.............................................................................................................................................................................258

Configuring an OSPF distribution list using ACLs ....................................................................................................................... 258Configuring an OSPF distribution list using route maps .............................................................................................................. 259Modify SPF timers.......................................................................................................................................................................260Modify redistribution metric type................................................................................................................................................. 261Modify administrative distance.................................................................................................................................................... 261Configure OSPF group LSA pacing............................................................................................................................................. 262Modify OSPF traps generated..................................................................................................................................................... 262Modify exit overflow interval.........................................................................................................................................................263Specify types of OSPF Syslog messages to log.......................................................................................................................... 263Configuring an OSPF network type............................................................................................................................................. 264Configuring OSPF Graceful Restart............................................................................................................................................. 265Configuring OSPF router advertisement...................................................................................................................................... 267Configuring OSPF shortest path first throttling.............................................................................................................................268

Displaying OSPF information.............................................................................................................................................................. 269Displaying general OSPF configuration information......................................................................................................................269Displaying OSPF area information............................................................................................................................................... 271Displaying OSPF neighbor information........................................................................................................................................ 272Displaying OSPF interface information.........................................................................................................................................273Displaying OSPF interface brief information................................................................................................................................. 275Displaying OSPF route information.............................................................................................................................................. 276Displaying OSPF database information........................................................................................................................................278Displaying OSPF external link state information........................................................................................................................... 279Displaying OSPF database-summary information........................................................................................................................280Displaying OSPF database link state information.........................................................................................................................280Displaying OSPF ABR and ASBR information..............................................................................................................................281Displaying OSPF trap status........................................................................................................................................................282Viewing Configured OSPF point-to-point links.............................................................................................................................282Displaying OSPF virtual neighbor and link information................................................................................................................. 283Clearing OSPF neighbors............................................................................................................................................................285Displaying OSPF Graceful Restart information.............................................................................................................................285Displaying OSPF Router Advertisement information.................................................................................................................... 286

Clearing OSPF information................................................................................................................................................................. 287Clearing OSPF neighbors............................................................................................................................................................287Disabling and re-enabling the OSPF process.............................................................................................................................. 287


Clearing OSPF routes................................................................................................................................................................. 287

OSPFv3.....................................................................................................................................................................................................289OSPFv3 overview...............................................................................................................................................................................289LSA types for OSPFv3....................................................................................................................................................................... 289Configuring OSPFv3...........................................................................................................................................................................290

Enabling OSPFv3........................................................................................................................................................................290Assigning OSPFv3 areas.............................................................................................................................................................291Assigning an area cost for OSPFv3 (optional parameter)............................................................................................................. 294Specifying a network type........................................................................................................................................................... 296Configuring virtual links............................................................................................................................................................... 296Changing the reference bandwidth for the cost on OSPFv3 interfaces........................................................................................ 298Redistributing routes into OSPFv3...............................................................................................................................................299Filtering OSPFv3 routes...............................................................................................................................................................302Configuring default route origination............................................................................................................................................ 305Modifying Shortest Path First timers............................................................................................................................................306Modifying administrative distance................................................................................................................................................306Configuring the OSPFv3 LSA pacing interval...............................................................................................................................307Modifying exit overflow interval....................................................................................................................................................308Modifying external link state database limit..................................................................................................................................308Setting all OSPFv3 interfaces to the passive state....................................................................................................................... 308Modifying OSPFv3 interface defaults...........................................................................................................................................308Disabling or re-enabling event logging.........................................................................................................................................309IPsec for OSPFv3........................................................................................................................................................................309Configuring IPsec for OSPFv3.....................................................................................................................................................310Configuring OSPFv3 Graceful Restart Helper mode.................................................................................................................... 316Configuring OSPFv3 Non-stop routing (NSR).............................................................................................................................. 317

Displaying OSPFv3 information.......................................................................................................................................................... 317General OSPFv3 configuration information.................................................................................................................................. 318Displaying OSPFv3 area information............................................................................................................................................318Displaying OSPFv3 database information....................................................................................................................................319Displaying IPv6 interface information........................................................................................................................................... 323Displaying IPv6 OSPFv3 interface information............................................................................................................................. 324Displaying OSPFv3 memory usage............................................................................................................................................. 328Displaying OSPFv3 neighbor information.....................................................................................................................................329Displaying routes redistributed into OSPFv3................................................................................................................................332Displaying OSPFv3 route information.......................................................................................................................................... 332Displaying OSPFv3 SPF information............................................................................................................................................334Displaying OSPFv3 GR Helper mode information ....................................................................................................................... 336Displaying OSPFv3 NSR information........................................................................................................................................... 337Displaying IPv6 OSPF virtual link information............................................................................................................................... 337Displaying OSPFv3 virtual neighbor information...........................................................................................................................338IPsec examples...........................................................................................................................................................................338

OSPFv3 clear commands ................................................................................................................................................................. 345Clearing all OSPFv3 data............................................................................................................................................................ 345Clearing OSPFv3 data in a VRF...................................................................................................................................................345Clearing all OSPFv3 packet counters.......................................................................................................................................... 345Scheduling Shortest Path First (SPF) calculation......................................................................................................................... 346Clearing all redistributed routes from OSPFv3............................................................................................................................. 346Clearing OSPFv3 neighbors........................................................................................................................................................ 346


Configuring BGP4 (IPv4)............................................................................................................................................................................349BGP4 overview.................................................................................................................................................................................. 349

Relationship between the BGP4 route table and the IP route table..............................................................................................350How BGP4 selects a path for a route (BGP best path selection algorithm).................................................................................. 351BGP4 message types................................................................................................................................................................. 352Grouping of RIB-out peers.......................................................................................................................................................... 354

Implementation of BGP4.................................................................................................................................................................... 354BGP4 restart...................................................................................................................................................................................... 354

BGP4 Peer notification during a management module switchover...............................................................................................355BGP4 neighbor local AS............................................................................................................................................................. 356

Basic configuration and activation for BGP4.......................................................................................................................................358Disabling BGP4...........................................................................................................................................................................358

BGP4 parameters.............................................................................................................................................................................. 359Parameter changes that take effect immediately......................................................................................................................... 360Parameter changes that take effect after resetting neighbor sessions..........................................................................................361Parameter changes that take effect after disabling and re-enabling redistribution........................................................................ 361

Memory considerations...................................................................................................................................................................... 361Memory configuration options obsoleted by dynamic memory.................................................................................................... 361

Basic configuration tasks required for BGP4...................................................................................................................................... 362Enabling BGP4 on the device......................................................................................................................................................362Changing the device ID............................................................................................................................................................... 362Setting the local AS number........................................................................................................................................................363Adding a loopback interface........................................................................................................................................................364Adding BGP4 neighbors............................................................................................................................................................. 364Adding a BGP4 peer group.........................................................................................................................................................371

Optional BGP4 configuration tasks.....................................................................................................................................................374Changing the Keep Alive Time and Hold Time.............................................................................................................................374Changing the BGP4 next-hop update timer................................................................................................................................ 374Enabling fast external fallover...................................................................................................................................................... 375Changing the maximum number of paths for BGP4 Multipath load sharing................................................................................. 375Customizing BGP4 Multipath load sharing.................................................................................................................................. 377Specifying a list of networks to advertise.....................................................................................................................................377Changing the default local preference......................................................................................................................................... 378Using the IP default route as a valid next-hop for a BGP4 route.................................................................................................. 379Changing the default MED (Metric) used for route redistribution.................................................................................................. 379Enabling next-hop recursion........................................................................................................................................................379Changing administrative distances.............................................................................................................................................. 382Requiring the first AS to be the neighbor AS............................................................................................................................... 383Disabling or re-enabling comparison of the AS-Path length......................................................................................................... 384Enabling or disabling comparison of device IDs...........................................................................................................................384Configuring the device to always compare Multi-Exit Discriminators............................................................................................384Treating missing MEDs as the worst MEDs................................................................................................................................. 385Configuring route reflection parameters.......................................................................................................................................385Configuring confederations......................................................................................................................................................... 388Aggregating routes advertised to BGP4 neighbors......................................................................................................................391

Configuring BGP4 restart................................................................................................................................................................... 391Configuring BGP4 Restart for the global routing instance............................................................................................................ 391Configuring BGP4 Restart for a VRF........................................................................................................................................... 392Configuring timers for BGP4 Restart (optional)............................................................................................................................ 392BGP4 null0 routing......................................................................................................................................................................393


Configuring BGP4 null0 routing................................................................................................................................................... 393Modifying redistribution parameters....................................................................................................................................................396

Redistributing connected routes..................................................................................................................................................397Redistributing RIP routes.............................................................................................................................................................397Redistributing OSPF external routes............................................................................................................................................397Redistributing static routes..........................................................................................................................................................398Redistributing IBGP routes..........................................................................................................................................................398

Filtering.............................................................................................................................................................................................. 398AS-path filtering.......................................................................................................................................................................... 398BGP4 filtering communities......................................................................................................................................................... 401Defining and applying IP prefix lists............................................................................................................................................. 402Defining neighbor distribute lists..................................................................................................................................................403Defining route maps....................................................................................................................................................................404Using a table map to set the tag value........................................................................................................................................ 411Configuring cooperative BGP4 route filtering............................................................................................................................... 412

Four-byte Autonomous System Numbers (AS4)................................................................................................................................. 414Enabling AS4 numbers............................................................................................................................................................... 415

BGP4 AS4 attribute errors..................................................................................................................................................................418Error logs.................................................................................................................................................................................... 418

Configuring route flap dampening.......................................................................................................................................................419Globally configuring route flap dampening...................................................................................................................................420Using a route map to configure route flap dampening for a specific neighbor.............................................................................. 421Removing route dampening from a route.................................................................................................................................... 421Displaying and clearing route flap dampening statistics............................................................................................................... 422

Generating traps for BGP4.................................................................................................................................................................423Configuring BGP4.............................................................................................................................................................................. 423Entering and exiting the address family configuration level..................................................................................................................425BGP route reflector............................................................................................................................................................................ 425

Configuring BGP route reflector.................................................................................................................................................. 426Specifying a maximum AS path length............................................................................................................................................... 428

Setting a global maximum AS path limit...................................................................................................................................... 429Setting a maximum AS path limit for a peer group or neighbor....................................................................................................429

BGP4 max-as error messages........................................................................................................................................................... 430Maximum AS path limit error....................................................................................................................................................... 430Memory limit error....................................................................................................................................................................... 430

Originating the default route............................................................................................................................................................... 430Changing the default metric used for route cost................................................................................................................................. 430Configuring a static BGP4 network ................................................................................................................................................... 431

Setting an administrative distance for a static BGP4 network...................................................................................................... 431Limiting advertisement of a static BGP4 network to selected neighbors...................................................................................... 432Dynamic route filter update......................................................................................................................................................... 432

Generalized TTL Security Mechanism support....................................................................................................................................434Displaying BGP4 information..............................................................................................................................................................434

Displaying summary BGP4 information....................................................................................................................................... 434Displaying the active BGP4 configuration.................................................................................................................................... 437Displaying summary neighbor information................................................................................................................................... 437Displaying BGP4 neighbor information........................................................................................................................................ 439Displaying peer group information............................................................................................................................................... 447Displaying summary route information.........................................................................................................................................447Displaying VRF instance information............................................................................................................................................448


Displaying the BGP4 route table..................................................................................................................................................448Displaying BGP4 route-attribute entries.......................................................................................................................................454Displaying the routes BGP4 has placed in the IP route table....................................................................................................... 455Displaying route flap dampening statistics...................................................................................................................................456Displaying the active route map configuration..............................................................................................................................457Displaying BGP4 graceful restart neighbor information................................................................................................................ 457Displaying AS4 details.................................................................................................................................................................458Updating route information and resetting a neighbor session...................................................................................................... 464Using soft reconfiguration........................................................................................................................................................... 465Dynamically requesting a route refresh from a BGP4 neighbor.................................................................................................... 467Closing or resetting a neighbor session.......................................................................................................................................469Clearing and resetting BGP4 routes in the IP route table............................................................................................................. 470

Clearing traffic counters......................................................................................................................................................................470Clearing diagnostic buffers................................................................................................................................................................. 470

Configuring BGP4+................................................................................................................................................................................... 473BGP4+ overview................................................................................................................................................................................ 473BGP global mode ..............................................................................................................................................................................473IPv6 unicast address family................................................................................................................................................................ 474BGP4+ neighbors.............................................................................................................................................................................. 475BGP4+ peer groups...........................................................................................................................................................................475BGP4+ next hop recursion.................................................................................................................................................................476BGP4+ NLRIs and next hop attributes.........................................................................................................

Documents

FastIron Ethernet Switch Layer 3 Routing Configuration ...noc.ucsc.edu/docs/BigCreek/fastiron-08030r-manuals/fastiron-08030mb-l3guide.pdfSupporting FastIron Software Release 08.0.30mb