Make Before Break Configuration For Lfa Frr - Cisco ASR 9000 Series Configuration Manual

Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
Command or Action
Step 4
graceful-restart
Example:
RP/0/RSP0/CPU0:router(config-ldp)# graceful-restart
Step 5 router-id 20.20.20.20
Example:
RP/0/RSP0/CPU0:router(config-ldp)# router-id
20.20.20.20
Step 6 session protection
Example:
RP/0/RSP0/CPU0:router(config-ldp)# session protection
Step 7
address-family ipv4
Example:
RP/0/RSP0/CPU0:router(config-ldp)# address-family ipv4
Step 8
commit
Example: Configuration to enable MLDP LFA FRR
mpls ldp
nsr
graceful-restart
!
router-id 20.20.20.20
session protection
address-family ipv4
!
!

Make Before Break Configuration for LFA FRR

Make Before Break (MBB) is an inherent nature of MLDP. In MBB configuration, configure forwarding
recursive to enable LFA FRR feature. If forwarding recursive is not configured, MLDP uses non-recursive
method to select MLDP core facing interface towards next hop. The detailed configuration steps and an
example follows.
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 6.0.x
MLDP Loop-Free Alternative Fast Reroute
Purpose
Restarts the interface.
Configures a router-id for the LDP process.
Enables LFA FRR in the per-prefix mode.
Enters address family configuration mode.
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