H3C Technologies H3C S6800 Series Switches - Manual (Page 43)

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Step Command Remarks
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 mappings from LSR B, and it does not filter
label mappings from LSR C.
Figure 16 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. H3C recommends using 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:
a. mpls ldp
b. vpn-instance vpn-instance-name
N/A
3. Configure a label
acceptance policy. accept-label peer peer-lsr-id prefix-list
prefix-list-name By default, LDP accepts all label
mappings.
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