Optional) Configuring Bfd For Pw; Optional) Configuring The Revertive Switchover - Huawei quidway s7700 Configuration Manual

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
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6.10.3 (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
l
Example

6.10.4 (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.
Issue 01 (2011-07-15)
NOTE
l Both primary and backup PWs need to be configured on the PE to which a CE is single-homed.
l Primary and backup PWs must have different VC IDs.
l The control word configuration on the primary and secondary PWs must be the same. Otherwise, lots
of packets will be lost after the primary/secondary PW switchover.
6.8 Configuring Static BFD for PW
6.9 Configuring Dynamic BFD for PW
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.
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