Optional) Configuring A Policy For Triggering Transit Lsp Establishment - Huawei AR1200 Series Configuration Manual - Mpls

Huawei AR1200 Series Enterprise Routers
Configuration Guide - MPLS
Step 2 Run:
mpls
The MPLS view is displayed.
Step 3 Perform either of the following steps to configure a policy for triggering LDP LSP establishment:
l To allow static routes and IGP routes to trigger LDP LSP establishment, run:
l To allow labeled public network BGP routes to trigger LDP LSP establishment, run:
One of the following parameters can be configured for a trigger policy:
l host: is the default policy and allows LDP to use 32-bit host-address routes to establish LSPs.
l all: allows LDP to use all static and IGP routes, but not public network BGP routes, to
l ip-prefix: allows LDP to use the routes that match an IP address prefix list to establish LSPs.
l none: does not allow LDP to use any routes to establish LSPs.
l bgp-label-route: allows LDP to use labeled public network BGP routes to establish LSPs.
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2.5.11 (Optional) Configuring a Policy for Triggering Transit LSP
Establishment
A policy for triggering transit LSP establishment can be configured to allow LDP to use a
specified route to establish a transit LSP.
Context
After MPLS LDP is enabled, LDP LSPs will be automatically established, leading to a large
number of transit LSPs and resulting in resource wastes. A policy for triggering transit LSP
establishment can be configured to allow LDP to only send Label Mapping messages upstream
for routes that match specified conditions to establish a transit LSP. This reduces the number of
unwanted LSPs and efficiently uses network resources.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
mpls ldp
The MPLS-LDP view is displayed.
Step 3 Run:
Issue 01 (2011-12-30)
lsp-trigger { all | host | ip-prefix ip-prefix-name | none }
lsp-trigger bgp-label-route
establish LSPs.
NOTE
LSPs can be established using exactly matching routes on LSRs. For example, an exactly matching host
route to an IP address with a 32-bit mask of a loopback interface can be used to trigger LSP establishment.
A policy for triggering LSP establishment cannot be modified during the LDP graceful restart (GR) process.
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