H3C SR8800 10G Mpls Configuration Manual page 30

Figure 8 Network diagram for label acceptance control
Drop label bindings
Upstream
Accept label bindings
Label advertisement control
Label advertisement control is for filtering label bindings to be advertised. A downstream LSR advertises
only the label bindings of the specified FECs to the specified upstream LSR. As shown in
downstream router LSR A advertises to upstream router LSR B only label bindings with FEC destinations
permitted by prefix list B, and advertises to upstream router LSR C only label bindings with FEC
destinations permitted by prefix list C.
Figure 9 Network diagram for label advertisement control
Configuration prerequisites
Before you configure LDP label filtering policies, you must create an IP prefix list. For information about
IP prefix list configuration, see Layer 3—IP Routing Configuration Guide.
Configuring LDP lable filtering
To configure LDP label filtering policies:
Step
1. Enter system view.
2. Enter MPLS LDP view.
Label bindings not permitted
LSR A
permitted by the label
filtering configuration
Label bindings
Downstream
LSR C
Command
system-view
mpls ldp
19
Downstream
LSR B
Remarks
N/A
N/A
Figure 9,