The mpls l2vpn pw bfd command enables dynamic BFD for PWs and adjusts BFD parameters on an AC interface.
The undo mpls l2vpn pw bfd command restores default BFD parameters of dynamic BFD for PWs on an AC interface.
By default, dynamic BFD for PWs is not configured on an AC interface.
mpls l2vpn pw bfd [ detect-multiplier multiplier | min-rx-interval rx-interval | min-tx-interval tx-interval ] * [ remote-vcid vc-id ] [ secondary ]
undo mpls l2vpn pw bfd [ detect-multiplier | min-rx-interval | min-tx-interval ] * [ secondary ]
undo mpls l2vpn pw bfd [ detect-multiplier multiplier | min-rx-interval rx-interval | min-tx-interval tx-interval ] * [ remote-vcid vc-id ] [ secondary ]
| Parameter | Description | Value |
|---|---|---|
| detect-multiplier multiplier | Specifies the local detection multiplier. | The value is an integer that ranges from 3 to 50. The default value is 3. |
| min-rx-interval rx-interval | Specifies the minimum interval for receiving BFD packets. | The value ranges from 100 to 1000, in milliseconds. By default, the value is 1000. After the set service-mode enhanced command is configured on the S5720-HI, S5731-H, S5731S-H, S5730-HI, and S6720-HI, the value ranges from 3 to 1000. After the set service-mode enhanced-bfd command is configured on the S5732-H, S6730S-H, and S6730-H, the value ranges from 3 to 1000. |
| min-tx-interval tx-interval | Specifies the minimum interval for sending BFD packets. | The value ranges from 100 to 1000, in milliseconds. By default, the value is 1000. After the set service-mode enhanced command is configured on the S5720-HI, S5731-H, S5731S-H, S5730-HI, and S6720-HI, the value ranges from 3 to 1000. After the set service-mode enhanced-bfd command is configured on the S5732-H, S6730S-H, and S6730-H, the value ranges from 3 to 1000. |
| remote-vcid vc-id | Specifies the VC ID of the peer device. | This parameter is mandatory when a multi-hop PW is detected. The value of this parameter is the VC ID of the remote end of the PW. The value is an integer that ranges from 1 to 4294967295. |
| secondary | Configures BFD and its parameters on the secondary PW.
By default, BFD and its parameters are configured on the primary PW. NOTE:
The secondary parameter cannot be run on Loopback interface
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On a network where BFD is used to detect faults, run the mpls l2vpn pw bfd command to enable dynamic BFD for PWs and adjust BFD parameters on an AC interface.
PrecautionsTo reduce usage of system resources, when a BFD session is detected in Down state, the system changes the minimum interval for receiving BFD packets and the minimum interval for sending BFD packets to random values between 1000 ms and 3000 ms. When the BFD session becomes Up, the configured intervals are restored.