4000 Router Series MPLS Configuration Guide

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To configure MPLS BFD for LSPs:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enable MPLS BFD.

mpls bfd enable By default, MPLS BFD is disabled.

3. Configure BFD to verify LSP

connectivity for an FEC.

mpls bfd dest-addr mask-length

[ nexthop nexthop-address

[ discriminator local local-id

remote remote-id ] ] [ template

template-name ]

By default, BFD is not configured to

verify LSP connectivity for an FEC.

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 4.

Table 4 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:

Ste

Command

Remarks

1. Enter system view.

system-view

N/A