Cisco NCS 5500 Series Configuration Manual page 32

Configuring Backup within a Forwarding Set
Action
P1-F Down
P2-F Down
P1-B Down
Configuration Example: Reciprocal FRR Backup
This example shows how to configure reciprocal FRR backup with in a forwarding path set.
RP/0/0/CPU0:Router# configure terminal
RP/0/0/CPU0:Router(config)# mpls static
RP/0/0/CPU0:Router(config-mpls-static)# lsp lsp1
RP/0/0/CPU0:Router(config-mpls-static-lsp)# in-label 25000 allocate
RP/0/0/CPU0:Router(config-mpls-static-lsp)# forward
RP/0/0/CPU0:Router(config-mpls-static-lsp-fwd)# path 1 nexthop GigabitEthernet0/0/0/0
10.1.0.1 out-label 25000 primary-and-backup backup-id 2
RP/0/0/CPU0:Router(config-mpls-static-lsp-fwd)# path 2 nexthop GigabitEthernet0/0/0/1
10.1.0.3 out-label 25001 primary-and-backup backup-id 1
RP/0/0/CPU0:Router(config-mpls-static-lsp-fwd)# exit
RP/0/0/CPU0:Router(config-mpls-static-lsp)# backup
RP/0/0/CPU0:Router(config-mpls-static-lsp-backup)# path 1 nexthop GigabitEthernet0/0/0/5
10.5.0.1 out-label pop primary-and-backup backup-id 2
RP/0/0/CPU0:Router(config-mpls-static-lsp-backup)# path 2 nexthop GigabitEthernet0/0/0/6
10.6.0.2 out-label pop primary-and-backup backup-id 1
RP/0/0/CPU0:Router(config-mpls-static-lsp-backup)# exit
The following table describes the forwarding behavior for reciprocal FRR backup.
Action
N/A
MPLS Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
24
Transient State Interface Steady State
P1-F FRR to P2-F
P2-F FRR to P1-B
P1-B FRR to P2-B
Transient State Interface Steady State
N/A
• P1-F: Up P2-F: Down
• P1-B: Up P2-B: Up
• P1-F: Down P2-F: Down
• P1-B: Up P2-B: Up
• P1-F: Down P2-F: Down
• P1-B: Down P2-B: Up
• P1-F: Up P2-F: Up
• P1-B: Up P2-B: Up
Implementing MPLS Static Labeling
Forward Steady State
• P1-F: Down P2-F:
Flow
• P1-B: Backup
P2-B: N/A
• P1-F: Down P2-F:
Down
• P1-B: Flow P2-B:
Backup
• P1-F: Down P2-F:
Down
• P1-B: Down P2-B:
Flow
Forward Steady State
• P1-F: Flow P2-F:
Flow
• P1-B: N/A P2-B:
N/A