Configuring Vll Frr; Establishing The Configuration Task - Huawei quidway s7700 Configuration Manual

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
route distinguisher: 100:1, MTU: 1500
import vpn target: 1:1,
export vpn target: 1:1,
remote vpn site(s) :
no.
1
Run the display mpls l2vpn { export-route-target-list | import-route-target-list } command.
You can find that the route target is correctly configured. For example:
<Quidway> display mpls l2vpn import-route-target-list
import vpn target list: 744:7

5.9 Configuring VLL FRR

This section describes how to configure VLL Fast Re-route (FRR). After VLL FRR is
configured, the VLL traffic is switched to the secondary path if the primary path fails. If the
primary path recovers, the VLL traffic can be switched back to it according to the revertive
switching policy.

5.9.1 Establishing the Configuration Task

Applicable Environment
VLL FRR Supported by the S7700 is mainly used in the networking modes of asymmetrically
connected CEs:
The CE on one end of the VC accesses the PE of higher reliability through a single reliable link.
The CE on the other end is dual-homed to the PE of lower reliability. Thus, two communication
paths exist between the CEs. The path of higher reliability functions as the master path, and the
path with the lower reliability functions as the backup path.
After the VLL FRR is configured, L2VPN traffic is rapidly switched to the backup path when
a fault occurs on the master path. After the fault on the master path is rectified, the L2VPN traffic
is switched back to the master path according to the revertive switchover policy.
Pre-configuration Tasks
Before configuring VPN FRR, complete the following tasks:
l
l
Issue 01 (2011-07-15)
remote-pe-id route-distinguisher
3.3.3.9 100:1
NOTE
For asymmetrically connected CEs, the primary and secondary IP addresses need to be configured on the
interface connecting the CE to the PE through a single link. When the master path is available, the CE uses
the primary IP address to communicate with the remote CE. When a fault occurs on the master path, the
local CE communicates with the remote CE by using the secondary IP address.
Configuring a PW on each of the master path and backup path for the networking where
CEs are asymmetrically connected to PEs (The types of PWs on the master path and backup
path must be the same.)
Configuring CEs to exchange routing information by using routing protocols or static routes
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