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Technical Solution Proposal
The NicIX team
IXP architectures
Layer 2Use a switch to interconnect ISPs
• Layer 2• Layer 2 with router reflector• Layer 2 with route server
Layer 3Use a router to interconnect ISPs
Selection of architecture
Layer 2 preferredMore autonomy to ISPsNo much processing in layer 2
The switch will not be bottleneck
Low costSimple for administration
Considered alternatives
Alternative ALayer 2 with route reflector
• Two switches for redundancy• Two route reflectors for redundancy
Alternative BLayer 2
• Two switches for redundancy
Alternative A - topology
Alternative A – some issues
The IXP is an AS( public ASN) Public IP addresses used BGP4 used ISPs may/may not collocate their
routers Transit for IXP services
The IXP gets transit from one or more ISPs
Alternative A - transit using IGP
Alternative A - transit using IBGP
Alternative A - transit using private connection
Which transit method to use? IGP
Not suitable for transit via multiple ISPs Additional administrative overhead
IBGP Suitable for transit via multiple ISPs
Private connection Needs additional physical setup Not suitable for transit via multiple ISPs
IBGP preferred
Alternative B - Topology
Alternative B
Alternative B – some issues
The IXP is one AS (public ASN) Public IP addresses used BGP4 used Full mesh peering between ISPs IXP peers with the transit ISP(s)
Alternative B - transit
Favorite topology
Favorite Topology
Equipment - selection
Switch Should have Gigabit Ethernet ports Should have sufficient ports Cost Technical support
Router Cost Technical Support Ipv6 support
Switch – list
Router - list
Overall equipment list
Other costs
Total cost
Refernces
Cisco Systems Inc., “Internet eXchange Points (IXP), peering and ISP Interconnection: The key stone of Internet Economy”, 1999
Barry Raveendran Greene , ”L2 Internet eXchange Point (IXP) using a BGP Route Reflector Technical Design, Configuration, and General Advice about IXPs”, 2000
Communication Systems Design 2002 Projects,” http://csd.ssvl.kth.se/~csd2002mozambiqueix”,MozambiqueIX
http://www.cisco.com http://www.extremenetworks.com http://www.techdata.com
Thank You