_-------------------------------------------------------------------------------
TOTAL: 1 Normal LSP(s) Found.
TOTAL: 0 Liberal LSP(s) Found.
TOTAL: 0 Frr LSP(s) Found.
A '*' before an LSP means the LSP is not established
A '*' before a Label means the USCB or DSCB is stale
A '*' before a UpstreamPeer means the session is stale
A '*' before a DS means the session is stale
A '*' before a NextHop means the LSP is FRR LSP
Run the display mpls lsp command to view LSP information.
<Huawei> display mpls lsp
----------------------------------------------------------------------
LSP Information: LDP LSP
----------------------------------------------------------------------
FEC In/Out Label In/Out IF Vrf Name
1.1.1.1/32 NULL/3 -/GigabitEthernet1/0/0
2.6 Configuring LDP Extension for Inter-Area LSP
Configuring LDP extension for inter-area LSP enables LDP to search for routes based on the
longest match rule to establish inter-area LDP LSPs.
2.6.1 Establishing the Configuration Task
Before configuring LDP extension for inter-area LSP, familiarize yourself with the applicable
environment, complete the pre-configuration tasks, and obtain the required data.
Applicable Environment
In a large-scale network, multiple IGP areas usually need to be configured for flexible network
deployment and fast route convergence. When advertising routes between IGP areas, to prevent
a large number of routes from consuming too many resources, an area border router (ABR) needs
to aggregate the routes in the area and then advertise the aggregated route to the neighbor IGP
areas. However, by default, when establishing LSPs, LDP searches the routing table for the route
that exactly matches the forwarding equivalence class (FEC) carried in the received Label
Mapping message. For aggregated routes, only liberal LDP LSPs, not inter-area LDP LSPs, can
be set up.
In this case, you can run the longest-match command to configure LDP to search for routes
based on the longest match rule to establish inter-area LDP LSPs.
Pre-configuration Tasks
Before configuring LDP extension for inter-area LSP, complete the following tasks:
l Configuring IP addresses for interfaces to make neighboring nodes reachable at the network
layer
l Configuring an IGP to advertise the network segments connecting to interfaces on each
node and to advertise the routes of hosts with LSR IDs
l Configuring the policy for aggregating routes
l Configuring MPLS and MPLS LDP
Data Preparation
To configure LDP extension for inter-area LSP, you need the following data.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - MPLS 2 MPLS LDP Configuration
Issue 01 (2011-12-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
50
To Next Page
Loading...
