Huawei S6700 Series Configuration Guide

6.15.2 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 Set an interval at which Hello packets are sent.
l Set the holding multiplier for neighboring devices.
Procedure
l 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.
l Set the holding multiplier for neighboring devices.
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 holding-multiplier number [ level-1 | level-2 ]
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Huawei S6700 Series Specifications

General

Brand	Huawei
Model	S6700 Series
Category	Switch
Language	English