Configuring a label acceptance policy

A label acceptance policy uses an IP prefix list to control the label mappings received from a peer.

As shown in Figure 17, LSR A uses an IP prefix list to filter label mappings from LSR B, and it does not filter label mappings from LSR C.

Figure 17: Label acceptance control diagram

A label advertisement policy on an LSR and a label acceptance policy on its upstream LSR can achieve the same purpose. As a best practice, use the label advertisement policy to reduce network load.

You must create an IP prefix list before you configure a label acceptance policy. For information about IP prefix list configuration, see Layer 3—IP Routing Configuration Guide.

To configure a label acceptance policy:

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter LDP view or enter LDP-VPN instance view.

  • Enter LDP view:mpls ldp

  • Enter LDP-VPN instance view:

    1. mpls ldp

    2. vpn-instance vpn-instance-name

N/A

3. Configure an IPv4 label acceptance policy.

accept-label peer peer-lsr-id prefix-list prefix-list-name

By default, LDP accepts all IPv4 FEC-label mappings.