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FAQ-How does BFD of NE40E&NE80E &NE5000E Cooperate with IP FRR

Publication Date:  2012-07-27 Views:  2 Downloads:  0
Issue Description
Q:
How does BFD of NE40E/80E/5000E cooperate with IP FRR?
Alarm Information
Null
Handling Process
A:
IP FRR switchover is to feel PST state. If it is required to use BFD to trigger rapidly, process-pst must be configured under BFD instance view. The command rapidly change PST state after BFD checks problem. IP FRR can take effect.
BFD + IP FRR cooperation configuration example:
//Enable globally and the interface BFD
<RouterA> system-view
[RouterA] bfd
[RouterA-bfd] quit
[RouterA] interface GigabitEthernet1/0/0
[RouterA-GigabitEthernet/0/0] bfd
[RouterA-GigabitEthernet/0/0] ip address 192.168.10.2 255.255.255.252
[RouterA] bfd test bind peer-ip 192.168.10.1 interface GigabitEthernet 1/0/0 
[RouterA-bfd-session-test] discriminator local 10
[RouterA-bfd-session-test] discriminator remote 20
[RouterA-bfd-session-test] min-tx-interval 10
[RouterA-bfd-session-test] min-rx-interval 10
[RouterA-bfd-session-test] detect-multiplier 15
[RouterA-bfd-session-test] process-pst 
//It must be configured, otherwise BFD+IP FRR does not cooperate.
[RouterA-bfd-session-test] commit  
//It must be configured, otherwise it is not in effect.
[RouterA] route-policy ip_frr permit node 10
[RouterA-route-policy] apply backup-nexthop 192.168.20.2
[RouterA-route-policy] apply backup-interface gigabitethernet2/0/0
//Enable public network IP FRR.
[RouterA] ip frr route-policy ip_frr
[RouterA] ip route-static 192.168.10.0 255.255.255.252 192.168.20.2
//If IP FRR is in effect, there must be two routes with different priority and the same items. They can be created through static route or dynamic route. There is static route and direct route of 192.168.10.0/30.
Root Cause
Keywords:
BFD: Bidirectional Forwarding Detection
FRR: Fast Reroute
PST: Primary State of the Entity
Suggestions
Null

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