(Optional) Configuring BFD on a Specified IPv6 Interface

Procedure

1. Run system-view

   The system view is displayed.

2. (Optional) To configure BFD session check for an IS-IS process, perform the following steps:
   1. Run the isis [ process-id ] command to enter the IS-IS view.
   2. Run the bfd session-up check command to configure BFD session check for the IS-IS process.
   

   When the Layer 2 network is running normally, IS-IS neighbor relationships can be established and routes can be delivered. However, if the Layer 3 network is unreachable, upper-layer traffic loss occurs. To resolve this problem, configure BFD session check for an IS-IS process by running the bfd session-up check command. This ensures that an IS-IS neighbor relationship is established only when the BFD session is up on corresponding interfaces. After this function is configured, it applies only to the neighbor relationships to be established (it does not apply to existing neighbor relationships).

3. Run interface interface-type interface-number

   The interface view is displayed.

4. Run isis ipv6 bfd enable

   BFD is enabled for the IPv6 interface to establish BFD sessions.

   BFD must be enabled globally before you perform this step. If BFD is enabled globally, this step is performed, and the IPv6 status of neighbors is up (or the DIS is up in the case of a broadcast network), default BFD parameters are used by this interface to establish BFD sessions.

5. (Optional) Run isis ipv6 bfd { min-rx-interval receive-interval | min-tx-interval transmit-interval | detect-multiplier multiplier-value | frr-binding } ^*

   BFD parameters are configured to establish BFD sessions.

   

   BFD parameters configured on an interface take precedence over those configured for a process in establishing dynamic BFD sessions.

6. (Optional) Run isis ipv6 bfd incr-cost { cost-value | max-reachable }

   The specified interface is enabled to adjust its cost based on the status of an associated BFD session.

   Regarding the configuration of adjusting the interface cost based on the status of an associated BFD session, the configuration in the interface view takes precedence over that in the IS-IS view.

7. Run commit

   The configuration is committed.