Configuring BFD over MPLS Traffic Engineering LSPs
Enabling BFD Parameters for BFD over TE Tunnels
BFD for TE tunnel is enabled at the head-end by configuring BFD parameters under the tunnel. When BFD
is enabled on the already up tunnel, TE waits for the bringup timeout before bringing down the tunnel. BFD
is disabled on TE tunnels by default. Perform these tasks to configure BFD parameters and enable BFD over
TE Tunnels.
BFD paces the creation of BFD sessions by limiting LSP ping messages to be under 50 PPS to avoid
variations in CPU usage.
Note
SUMMARY STEPS
1.
configure
2.
interface tunnel-te interface-number
3.
bfd fast-detect
4.
bfd minimum-intervalmilliseconds
5.
bfd multiplier number
6.
commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Configures MPLS Traffic Engineering (MPLS TE) tunnel
interface and enters into MPLS TE tunnel interface
configuration mode.
interface tunnel-te interface-number
Example:
RP/0/RSP0/CPU0:router(config)#interface
tunnel-te 65535
Step 2
Enables BFD fast detection.bfd fast-detect
Example:
RP/0/RSP0/CPU0:router(config-if)#bfd
fast-detect
Step 3
Configures hello interval in milliseconds.
bfd minimum-intervalmilliseconds
Step 4
Example:
RP/0/RSP0/CPU0:router(config-if)#bfd
minimum-interval 2000
Hello interval range is 100 to 30000 milliseconds. Default
hello interval is 100 milliseconds
Configures BFD multiplier detection.
bfd multiplier number
Step 5
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
222 OL-30423-03
Implementing BFD
Configuring BFD over MPLS Traffic Engineering LSPs
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