lsp-trigger
Use lsp-trigger to configure an LSP generation policy for IPv4 FECs.
Use undo lsp-trigger to restore the default.
Syntax
lsp-trigger { all | prefix-list prefix-list-name }
undo lsp-trigger
Default
LDP only uses redistributed IPv4 host routes with a 32-bit mask to generate LSPs.
Views
LDP view
LDP-VPN instance view
Predefined user roles
network-admin
Parameters
all: Enables LDP to use all redistributed routes to generate LSPs.
prefix-list prefix-name: Specifies an IPv4 prefix list by its name, a case-sensitive string of 1 to 63 characters. LDP uses only the redistributed routes permitted by the IPv4 prefix list to generate LSPs.
Usage guidelines
LDP assigns labels to the routes that have been redistributed into LDP to generate LSPs. An LSP generation policy specifies the routes that LDP uses to generate LSPs.
The default LSP generation policy depends on the label distribution control mode.
In Ordered mode, LDP can only use the following routes to generate LSPs:
Loopback interface address routes with a 32-bit mask.
The routes with a 32-bit mask that match the FECs of label mappings received from downstream LSRs.
In Independent mode, LDP can use all routes with a 32-bit mask to generate LSPs.
After you configure an LSP generation policy, LDP uses all redistributed routes or those permitted by the IPv4 prefix list to generate LSPs, regardless of the label distribution control mode.
As a best practice, use the default LSP generation policy.
Examples
# Configure an LSP generation policy that enables LDP to use only redistributed routes 10.10.1.0/24 and 10.20.1.0/24 to establish LSPs for the public network.
<Sysname> system-view [Sysname] ip prefix-list egress-fec-list index 1 permit 10.10.1.0 24 [Sysname] ip prefix-list egress-fec-list index 2 permit 10.20.1.0 24 [Sysname] mpls ldp [Sysname-ldp] lsp-trigger prefix-list egress-fec-list
Related commands
import bgp
ip prefix-list (Layer 3—IP Services Command Reference)