Configuring Pw Switching - Huawei quidway s7700 Configuration Manual

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
Applicable Environment
To support Multi-Hop, the PW switching is needed. MH-PW requires switching labesl at PW
label layer while forwarding packets.
PW switching must be configured on the S-PE with high performance and capability of setting
up large numbers of MPLS LDP sessions.
When configuring MH-PW, you need PW switching on the S-PE.
In the following cases, PW switching is required:
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Pre-configuration Tasks
Before configuring PW switching, complete the following tasks:
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Data Preparation
To configure PW switching, you need the following data.
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6.6.2 Configuring PW Switching

A switching PW can be any of three types, namely, dynamic switching PW, static switching
PW, and mixed switching PW.
Context
The PW switching has three modes:
Issue 01 (2011-07-15)
Two PEs are not located in the same AS and no signaling or tunnel can be set up between
the two PEs. (If inter-AS tunnel is set up by the BGP labeled route, MH-PW is not required.)
The signaling of two PEs differs from each other.
If access device supports MPLS, but cannot set up large numbers of LDP session, you can
use User Facing Provider Edge (UFPE) as U-PE. And you can use the S-PE as the switching
node of LDP session, which is similar to signaling reflector.
Enabling MPLS L2VPN on the PEs
6.4 Configuring a Static PW
6.5 Configuring a Dynamic PW
PWs
Data
IP address and VC-ID of static PWs or dynamic PWs to-be-switch
Encapsulation type of L2VC
Sending label and receiving label of L2VPN if the PW to be switched is a static PW
The MTU values of the interfaces on the two ends of the PW if the PW to be switched
is a static PW
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on U-PEs if the PW switching is between two static PWs
on U-PEs if the PW switching is between two dynamic
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