Configuring The Interval For Detecting Is-Is Neighboring Device Failures - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
No.
4
6.8.2 Configuring the Interval for Detecting IS-IS Neighboring
Device Failures
To minimize the effects caused by neighboring device failures on an IS-IS network, accelerate
the speed of detecting IS-IS neighboring device failures.
Context
Connection status between an IS-IS device and its neighboring devices can be monitored by
exchanging Hello packets at intervals. An IS-IS neighboring device is considered Down if the
IS-IS device does not receive any Hello packets from the neighboring device within the specified
period (called the holding time). A failure in an IS-IS neighboring device will trigger LSP
flooding and SPF calculation, after which IS-IS routes are reconverged.
To speed up fault detection, use the following methods to accelerate the speed of detecting IS-
IS neighboring device failures:
l
l
l
Procedure
l
Issue 01 (2012-03-15)
Data
Route convergence priority
Shorten the interval at which Hello packets are sent.
Shorten the holding time of neighboring devices.
Configuring Dynamic IPv4 BFD for IS-IS.
NOTE
Configuring IPv4 BFD for IS-IS is recommended because this method provides a faster fault detection
speed than the other two methods.
Set an interval at which Hello packets are sent.
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
3. Run:
isis timer hello hello-interval [ level-1 | level-2 ]
The interval at which Hello packets are sent is set.
NOTE
A broadcast link can transmit both Level-1 and Level-2 Hello packets. You can set different
sending intervals for these two types of Hello packets. By default, both Level-1 and Level-2
Hello packets are sent.
A P2P link can transmit only one type of Hello packets. Therefore, there is no need to specify
the level-1 or level-2 parameter if a P2P link is used.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
6 IS-IS Configuration
272