Example
Run the display ip routing-table vpn-instance command on the PE, and you can find that the
route to the CE and the route to the destination switch in the public network exist in the VPN
routing table.
Run the display ip routing-table command on the CE, and you can find that the CE has the
route to the destination switch in the public network and the destination switch in the public
network has the route to the CE.
The CE and the destination switch in the public network can successfully ping each other.
3.12 Configuring VPN FRR
In the networking of CE dual-homing, you can configure VPN FRR to ensure the end-to-end
VPN service fast switchover if the PE fails.
3.12.1 Establishing the Configuration Task
Before configuring VPN FRR, familiarize yourself with the applicable environment, complete
the pre-configuration tasks, and obtain the required data. This can help you complete the
configuration task quickly and accurately.
Applicable Environment
It is applied to the service sensitive to packet loss or delay in the private network.
You can configure VPN FRR in either of the following modes:
l Manual VPN FRR: Information such as the backup next hop is specified.
l Auto VPN FRR: The backup next hop is unspecified, but a proper next hop is selected for
the VPN route.
You can select either mode as required. If both of them are configured, manual VPN FRR has
a higher priority. When manual VPN FRR fails, auto VPN FRR takes effect.
Pre-configuration Tasks
Before configuring VPN FRR, complete the following tasks:
l Configuring the routing protocol on the switchs to achieve internetworking
l Generating two unequal-cost routes by configuring different metrics
l Setting up the VPN network
CAUTION
Configuring the lsp-trigger command on the P is not recommended when an LSP is created
on the VPN backbone network. Use the default configuration on the P. Otherwise, VPN
FRR switchback may fail.
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
148
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