Huawei quidway s7700 Configuration Manual page 482

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
Context
Do as follows on the PEs of the two ends of the VC:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
mpls l2vpn l2vpn-name encapsulation { ethernet | vlan } [ control-word | no-control-
word ]
A VPN is created and the MPLS-L2VPN instance view is displayed.
Step 3 Run:
route-distinguisher route-distinguisher
The RD for L2VPN is configured.
Step 4 (Optional) Run:
mtu mtu-value
The Layer 2 MTU is set for the VPN.
The MTU for the VPN should be consistent in the whole network. If the MTU of the same VPN
on two PEs differs, these two PEs cannot exchange reachability information and cannot set up
connections. By default, the MTU is 1500 in the MPLS-L2VPN instance view.
Devices of some manufacturers do not support the MTU matching check in the L2VPN instance.
When Huawei products are connected with non-Huawei products in Kompella mode, you can
choose one of the following configurations on the S7700:
l Configure the MTU of the L2VPN on the PE to be the same as that of non-Huawei products.
l Use the ignore-mtu-match command to ignore the MTU matching check.
Step 5 (Optional) Run:
ignore-mtu-match
The MTU matching check is ignored.
Step 6 Run:
vpn-target vpn-target & <1-16> [ both | export-extcommunity | import-extcommunity ]
The VPN target is configured.
The Kompella VLL must create an L2VPN instance on the PE for each directly connected CE.
When an L2VPN is created, the specified encapsulation type must be consistent with that of the
CE interface.
The configuration and usage of the VPN target and RD are completely the same as that of the
BGP/MPLS VPN. It means that the configuration and usage of the VPN target and RD are
omitted here except one point: For Kompella VLL, you must configure RD before configuring
the other commands. The RD cannot be changed once it is configured. The only way to modify
RD is to delete this VLL and re-create one.
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Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 VLL Configuration
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