Huawei quidway s7700 Configuration Manual page 563

Smart routing switch

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Quidway S7700 Smart Routing Switch

Configuration Guide - VPN

ASBR1 is a CE.

Option A is easy to implement. No inter-AS configuration is needed on the ASBRs. The

interfaces that connect the ASBR do not need to be configured with any IP addresses.

In Option A, the two directly-connected ASBRs use different links including physical and logical

links for each inter-AS VPN. The links work as ACs to connect the VPN. Thus, the performance

requirement on the PE devices is relatively high.

PWE3 Tracert

With the broad applications of PWE3, PWE3 is required to support related operations and

maintenance. PWE3 tracert is a type of a network maintenance tool developed to meet this

requirement.

PWs are classified into SH PWs and MH PWs based on different networking types. Similarly,

PWE3 tracert is classified into PWE3 SH tracecert and PWE3 MH tracert.

Figure 6-9 Networking diagram of PWE3 SH tracert

Issue 01 (2011-07-15)

6-8, as for ASBR1 in the AS 100, ASBR2 is a CE. Similarly, as for ASBR2,

Basic principle

– PWE3 SH Tracert

– As shown in

VPN 2; the LSP from PE1 to PE4 is PE1-P-PE4; the LSP from PE2 to PE3 is PE2-

– On PE1, you can start PWE3 tracert of VPN 1 by using related commands. This

PWE3 tracert is the same as the LSP tracert in the public network, except that a PW

label is added to packets, and the remote PE checks whether the receiving PW label

and the VC ID are the same as those on the local end.

Huawei Proprietary and Confidential

6-9, CE1 and CE4 belong to VPN 1; CE2 and CE3 belong to

6 PWE3 Configuration