R0106-HP MSR Router Series MPLS Configuration Guide(V7)

Figure 15 Label advertisement control diagram

A label advertisement policy on an LSR and a label acceptance policy on its upstream LSR can achieve

the same purpose. HP recommends that you use label advertisement policies to reduce network load if

downstream LSRs support label advertisement control.

Before you configure an LDP label advertisement policy, create an IP prefix list. For information about IP

prefix list configuration, see Layer 3—IP Routing Configuration Guide.

To configure a label advertisement policy:

Ste

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:

a. mpls ldp

b. vpn-instance vpn-instance-name

N/A

3. Configure a label

advertisement policy.

advertise-label prefix-list prefix-list-name

[ peer peer-prefix-list-name ]

By default, LDP advertises all

label mappings permitted by the

LSP generation policy to all peers.

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 16, LSR A uses an IP prefix list to filter label ma

ppings from LSR B, and it does not filter

label mappings from LSR C.