Optional) Setting A Hold-Down Timer - Huawei AR1200 Series Configuration Manual - Mpls

Huawei AR1200 Series Enterprise Routers
Configuration Guide - MPLS
Context
With synchronization between LDP and static routes, you can switch traffic from the faulty
primary link to the backup link by suppressing the activation of static routes and delay traffic
switchback to the primary link, ensuring that LDP is synchronous with static routes.
Perform the following steps on devices on both ends of the primary and backup links:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ip route-static ip-address { mask | mask-length } interface-type interface-number
[ nexthop-address ] [ preference preference | tag tag ]
text ]
Synchronization between LDP and static routes is configured.
By default, synchronization between LDP and static routes is not enabled.
----End

2.8.3 (Optional) Setting a Hold-down Timer

When the primary link recovers, a static route does not become active immediately. Instead, the
static route becomes active only when an LDP session is established before the Hold-down timer
expires. Then traffic is switched back to the primary link.
Context
After a Hold-down timer is set on an interface, the static route enabled with synchronization
between LDP and static routes becomes inactive temporarily and waits for an LDP session to
be established before the Hold-down timer expires. This implements synchronization between
LDP and static routes. If the Hold-down timer expires, the static route becomes active regardless
of whether the LDP session has been established.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
Issue 01 (2011-12-30)
NOTE
Only the static route with a specified outbound interface can be configured with synchronization between
LDP and static routes.
NOTE
Setting a Hold-down timer on loopback interfaces or null interfaces is not allowed.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2 MPLS LDP Configuration
*
ldp-sync [ description
59