H3C Technologies H3C S7500E Series Switches - Manual (Page 64)

2-22
Figure 2-9 Network diagram for label advertisement control
Follow these steps to configure LDP label filtering policies:
To do… Use the command… Remarks
Enter system view system-view —
Enter MPLS LDP view mpls ldp —
Configure a label
acceptance control policy
accept-label peer peer-id ip-prefix ip-prefix-name
Optional
Not configured by default.
Configure a label
advertisement control
policy
advertise-label ip-prefix ip-prefix-name [ peer
peer-ip-prefix-name ]
Required
Not configured by default.
For two neighboring LSRs, configuring a label acceptance control policy on the upstream LSR and
configuring a label advertisement control policy on the downstream LSR can achieve the same effect.
To reduce the network load, you are recommended to configure only label advertisement control
policies.
Maintaining LDP Sessions
Configuring BFD for MPLS LDP
MPLS itself cannot detect a neighbor failure or link failure in time. If communication between two LDP
remote peers fails, the LDP session will be down, and as a result, MPLS forwarding will fail. By
cooperating with bidirectional forwarding detection (BFD), MPLS LDP can be quickly aware of
communication failures between LDP peers, improving performances of existing MPLS networks.