5.9.4 (Optional) Configuring BFD for PW
BFD for PW expedites the fault detection on the public network.
Context
BFD for PW, which speeds up fault detection, is recommended.
Static BFD for PW or dynamic BFD for PW can be configured on PEs. For detailed
configuration, see the following sections:
l 6.8 Configuring Static BFD for PW
l 6.9 Configuring Dynamic BFD for PW
Example
NOTE
l BFD for PW must be configured or deleted on the PEs at the both ends of a PW simultaneously.
Otherwise, the PW statuses on the two PEs are different.
l To detect statuses of the tunnels that carry PWs, you can configure BFD for tunnels. For detailed
configuration, refer to the chapters "Basic MPLS Configuration" and "MPLS TE Configuration" in the
Quidway S7700 Smart Routing Switch Configuration Guide - MPLS.
5.9.5 (Optional) Configuring the Revertive Switchover
The revertive switching policies can be classified into three modes: immediate revertive mode,
delayed revertive mode, and non-revertive mode. By default, the revertive switching policy is
in delayed revertive mode.
Context
When CEs are connected to PEs asymmetrically, do as follows on the PE (where traffic is
switched) to which a CE is connected through a single link:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The AC interface view is displayed.
Step 3 Run:
mpls l2vpn reroute { { delay delay-time | immediately } [ resume resume-time ] |
never }
The revertive switchover policy is configured.
The types of the revertive switchover on PEs are as follows:
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 5 VLL Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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