(Optional) Changing the BFD Detection Time

Procedure

1. Run system-view

   The system view is displayed.

2. Run bfd session-name

   The BFD session view is displayed.

3. Run min-tx-interval tx-interval

   The minimum interval at which BFD control packets are sent is set.

4. Run min-rx-interval rx-interval

   The minimum interval at which BFD control packets are received is set.

   

   If a BFD session goes Down, a device automatically changes the intervals at which BFD control packets are sent and received to random values greater than 1000 milliseconds. After the BFD session goes Up, the device restores the configured intervals.

5. Run detect-multiplier multiplier

   The local detection multiplier is set.

   

   In BFD for route scenarios, a route's outbound interface is an inter-board trunk interface. If the board on which the trunk interface's any member interface resides fails and the BFD detection time is less than 200 ms, the BFD session goes Down because the inter-board trunk switching time is 200 ms. Therefore, you are advised to set the BFD detection time to a value greater than 3 x 100 ms.

6. Run commit

   The configuration is committed.