isis timer hello

Function

The isis timer hello command sets an interval for a broadcast interface to send Hello packets of a corresponding level.

The undo isis timer hello command restores the default value.

By default, the interval at which Hello packets are sent is 10 seconds.

Format

isis timer hello hello-interval [ conservative ]

undo isis timer hello [ hello-interval ]

undo isis timer hello hello-interval conservative

Parameters

Parameter	Description	Value
hello-interval	Specifies the interval at which Hello packets are sent on an interface.	The value is an integer ranging from 1 to 255, in seconds.
conservative	Enables the conservative mode for the holdtime of the IS-IS neighbor relationship. If the parameter is specified and the holdtime of the IS-IS neighbor relationship is less than 20s, the IS-IS neighbor relationship is disconnected when the hold time elapses. If the parameter is not specified and the holdtime of the IS-IS neighbor relationship is less than 20s, the IS-IS neighbor relationship is disconnected when the period of the hold time and a delay elapses.	-

Parameter

Description

Value

hello-interval

Specifies the interval at which Hello packets are sent on an interface.

The value is an integer ranging from 1 to 255, in seconds.

conservative

Enables the conservative mode for the holdtime of the IS-IS neighbor relationship.

If the parameter is specified and the holdtime of the IS-IS neighbor relationship is less than 20s, the IS-IS neighbor relationship is disconnected when the hold time elapses.
If the parameter is not specified and the holdtime of the IS-IS neighbor relationship is less than 20s, the IS-IS neighbor relationship is disconnected when the period of the hold time and a delay elapses.

Views

100GE interface view, 10GE interface view, 25GE sub-interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, GE optical interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, Loopback interface view, Tunnel interface view, VBDIF interface view, VE sub-interface view, VE interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
isis	write

Usage Guidelines

Usage Scenario

On a broadcast link, Level-1 and Level-2 Hello packets are sent separately, and the intervals at which they are sent need to be set respectively. On a P2P link, neither level-1 nor level-2 is required because there is only one type of Hello packets. The shorter the interval, the more system resources used to send Hello packets. The interval should therefore be set as required.

Example

# Set the interval at which Level-2 Hello packets are sent to 20 seconds on VBDIF 10.

<HUAWEI> system-view
[~HUAWEI] isis 1
[*HUAWEI-isis-1] quit
[*HUAWEI] bridge-domain 10
[*HUAWEI-bd10] quit
[*HUAWEI] interface vbdif 10
[*HUAWEI-Vbdif10] isis enable 1
[*HUAWEI-Vbdif10] isis timer hello 20 level-2