Configuring MPLS OAM for MPLS TE tunnels
MPLS OAM only supports BFD for MPLS TE tunnel connectivity verification.
To run BFD on an MPLS TE tunnel, configure both the local and remote devices as described in Table 29.
Table 29: Configurations on the local and remote devices
BFD session establishment mode | Node type | Execute the "mpls bfd enable" command? | Execute the "mpls bfd" command? | Configure the discriminator keyword? |
|---|---|---|---|---|
Static mode | Local | Yes | Yes | Yes |
Remote | Yes | Yes | Yes | |
Dynamic mode | Local | Yes | Yes | No |
Remote | Yes | No | N/A |
Follow these guidelines to configure BFD for an MPLS TE tunnel:
To establish the BFD session in static mode, make sure the local discriminator and remote discriminator configured on the local device are the same as the remote discriminator and local discriminator configured on the remote device.
The source address of the BFD session is the MPLS LSR ID of the local device. Before you configure BFD for the LSP tunnel, configure an MPLS LSR ID for the local device and make sure a route is available on the remote device to reach the MPLS LSR ID.
On a BFD session established in static mode, the ingress node and egress node both operate in active mode. On a BFD session established in dynamic mode, the egress node operates in active mode and the ingress node operates in passive mode. Executing the bfd session init-mode command on the ingress or egress node does not change the node operating mode.
If both BFD for MPLS TE tunnel connectivity verification and BFD for FRR are enabled, set the BFD detection interval for MPLS TE tunnel connectivity verification to be longer than the BFD detection interval for FRR (for example, use BFD to detect RSVP neighbors) to make sure the BFD session for MPLS TE tunnel connectivity verification is not down during an FRR switchover.
To configure MPLS BFD for MPLS TE tunnels:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enable MPLS BFD. | mpls bfd enable | By default, MPLS BFD is disabled. |
3. Enter the view of the MPLS TE tunnel interface. | interface tunnel number | N/A |
4. Configure BFD to verify MPLS TE tunnel connectivity. | mpls bfd [ discriminator local local-id remote remote-id ] [ template template-name ] | By default, BFD is not configured to verify MPLS TE tunnel connectivity. |