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Pre-configuration Tasks
Before configuring inter-AS PWE3, complete the following tasks:
l Configuring an IGP protocol for MPLS backbone networks in each AS to ensure IP
connectivity within an AS
l Configuring basic MPLS functions for MPLS backbone networks in each AS
l Configuring MPLS LDP for MPLS backbone networks in each AS and establishing LDP
LSP
Data Preparation
To configure inter-AS PWE3, you need the following data.
No. Data
1 Option of the inter-AS VPN
2 AS number of each AS
6.11.2 Configuring Inter-AS PWE3-Option A
In inter-AS PWE3 OptionA, each ASBR must reserve a sub-interface for each inter-AS VC. If
the number of inter-AS VCs is small, this solution can be used. Compared with L3VPN, this
inter-AS L2VPN solution consumes more resources and requires heavier configuration
workload, which is not recommended.
Context
The configurations of inter-AS PWE3-Option A can be summarized as follows:
l
6.5 Configuring a Dynamic PW for each AS
l Configuring the local ASBR by regarding the peer ASBR as its CE
l No inter-AS configuration is needed on the ASBRs.
l You need not configure the IP addresses on the interfaces that directly connected ASBRs.
The configuration details are not mentioned here.
6.11.3 Checking the Configuration
After inter-AS PWE3 is configured, you can view PW information on the local end and remote
end.
Prerequisite
The configurations of the Inter-AS PWE3 function are complete.
Procedure
l Run the display mpls l2vc [ vc-id | interface interface-type interface-number ] command
to check information about the PW on the local PE.
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
6 PWE3 Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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