MPLS Configuration Guide for Cisco NCS 6000 Series Routers, Release
5.2.x
First Published: 2014-08-25
Last Modified: 2016-03-01
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C O N T E N T S
P r e f a c e Preface xiii
Changes to This Document xiii
Obtaining Documentation and Submitting a Service Request xiii
C H A P T E R 1 New and Changed MPLS Features 1
New and Changed MPLS Feature Information 1
C H A P T E R 2 Implementing MPLS Label Distribution Protocol 3
Prerequisites for Implementing Cisco MPLS LDP 4
Information About Implementing Cisco MPLS LDP 4
Overview of Label Distribution Protocol 4
Label Switched Paths 4
LDP Control Plane 4
Exchanging Label Bindings 5
LDP Forwarding 6
LDP Graceful Restart 7
Control Plane Failure 8
Phases in Graceful Restart 9
Recovery with Graceful-Restart 10
Label Advertisement Control (Outbound Filtering) 11
Label Acceptance Control (Inbound Filtering) 11
Local Label Allocation Control 12
Session Protection 12
IGP Synchronization 13
IGP Auto-configuration 14
LDP Nonstop Routing 14
IP LDP Fast Reroute Loop Free Alternate 15
MPLS Configuration Guide for Cisco NCS 6000 Series Routers, Release 5.2.x
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Downstream on Demand 16
How to Implement MPLS LDP 17
Configuring LDP Discovery Parameters 17
Configuring LDP Discovery Over a Link 18
Configuring LDP Discovery for Active Targeted Hellos 21
Configuring LDP Discovery for Passive Targeted Hellos 23
Configuring Label Advertisement Control (Outbound Filtering) 25
Setting Up LDP Neighbors 26
Setting Up LDP Forwarding 28
Setting Up LDP NSF Using Graceful Restart 30
Configuring Label Acceptance Control (Inbound Filtering) 32
Configuring Local Label Allocation Control 33
Configuring Session Protection 34
Configuring LDP IGP Synchronization: OSPF 35
Configuring LDP IGP Synchronization: ISIS 36
Enabling LDP Auto-Configuration for a Specified OSPF Instance 37
Enabling LDP Auto-Configuration in an Area for a Specified OSPF Instance 39
Disabling LDP Auto-Configuration 40
Configuring LDP Nonstop Routing 41
Configuring LDP Downstream on Demand mode 42
Configuration Examples for Implementing MPLS LDP 43
Configuring LDP with Graceful Restart: Example 43
Configuring LDP Discovery: Example 43
Configuring LDP Link: Example 44
Configuring LDP Discovery for Targeted Hellos: Example 44
Configuring Label Advertisement (Outbound Filtering): Example 44
Configuring LDP Neighbors: Example 45
Configuring LDP Forwarding: Example 45
Configuring LDP Nonstop Forwarding with Graceful Restart: Example 46
Configuring Label Acceptance (Inbound Filtering): Example 46
Configuring Local Label Allocation Control: Example 47
Configuring LDP Session Protection: Example 47
Configuring LDP IGP Synchronization—OSPF: Example 47
Configuring LDP IGP Synchronization—ISIS: Example 47
Configuring LDP Auto-Configuration: Example 48
MPLS Configuration Guide for Cisco NCS 6000 Series Routers, Release 5.2.x
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Contents
Configure IP LDP Fast Reroute Loop Free Alternate: Examples 48
Verify IP LDP Fast Reroute Loop Free Alternate: Example 50
Additional References 52
C H A P T E R 3 Implementing RSVP for MPLS-TE 55
Prerequisites for Implementing RSVP for MPLS-TE 55
Information About Implementing RSVP for MPLS-TE 56
Overview of RSVP for MPLS-TE 56
LSP Setup 56
High Availability 57
Graceful Restart 57
Graceful Restart: Standard and Interface-Based 58
Graceful Restart: Figure 59
ACL-based Prefix Filtering 60
RSVP MIB 60
Information About Implementing RSVP Authentication 61
RSVP Authentication Functions 61
RSVP Authentication Design 61
Global, Interface, and Neighbor Authentication Modes 62
Security Association 63
Key-source Key-chain 64
Guidelines for Window-Size and Out-of-Sequence Messages 65
Caveats for Out-of-Sequence 65
How to Implement RSVP 65
Configuring Traffic Engineering Tunnel Bandwidth 66
Confirming DiffServ-TE Bandwidth 66
Enabling Graceful Restart 67
Configuring ACL-based Prefix Filtering 68
Configuring ACLs for Prefix Filtering 68
Configuring RSVP Packet Dropping 69
Verifying RSVP Configuration 70
Enabling RSVP Traps 73
How to Implement RSVP Authentication 74
Configuring Global Configuration Mode RSVP Authentication 75
Enabling RSVP Authentication Using the Keychain in Global Configuration Mode 75
MPLS Configuration Guide for Cisco NCS 6000 Series Routers, Release 5.2.x
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Contents
Configuring a Lifetime for RSVP Authentication in Global Configuration Mode 76
Configuring the Window Size for RSVP Authentication in Global Configuration
Mode 76
Configuring an Interface for RSVP Authentication 77
Specifying the RSVP Authentication Keychain in Interface Mode 77
Configuring a Lifetime for an Interface for RSVP Authentication 78
Configuring the Window Size for an Interface for RSVP Authentication 80
Configuring RSVP Neighbor Authentication 81
Specifying the Keychain for RSVP Neighbor Authentication 81
Configuring a Lifetime for RSVP Neighbor Authentication 82
Configuring the Window Size for RSVP Neighbor Authentication 83
Verifying the Details of the RSVP Authentication 84
Eliminating Security Associations for RSVP Authentication 84
Configuration Examples for RSVP 84
Bandwidth Configuration (Prestandard): Example 85
Bandwidth Configuration (MAM): Example 85
Bandwidth Configuration (RDM): Example 85
Refresh Reduction and Reliable Messaging Configuration: Examples 85
Refresh Interval and the Number of Refresh Messages Configuration: Example 86
Retransmit Time Used in Reliable Messaging Configuration: Example 86
Acknowledgement Times Configuration: Example 86
Summary Refresh Message Size Configuration: Example 86
Disable Refresh Reduction: Example 86
Configure Graceful Restart: Examples 87
Enable Graceful Restart: Example 87
Enable Interface-Based Graceful Restart: Example 87
Change the Restart-Time: Example 87
Change the Hello Interval: Example 87
Configure ACL-based Prefix Filtering: Example 88
Set DSCP for RSVP Packets: Example 88
Enable RSVP Traps: Example 88
Configuration Examples for RSVP Authentication 89
RSVP Authentication Global Configuration Mode: Example 89
RSVP Authenticatio
