isis timer hello (interface view)

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 [ level-1 | level-2 ] [ conservative ]

undo isis timer hello [ hello-interval ] [ level-1 | level-2 ]

undo isis timer hello hello-interval [ level-1 | level-2 ] conservative

Parameters

Parameter	Description	Value
hello-interval	Specifies an interval at which Hello packets are sent.	The value is an integer ranging from 1 to 255, in seconds.
level-1	Indicates an interval at which Level-1 Hello packets are sent.	-
level-2	Indicates an interval at which Level-2 Hello packets are sent. If neither Level-1 nor Level-2 is specified, the default level is Level-1 and Level-2. level-1 and level-2 can be configured only on IS-IS broadcast interfaces.	-
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, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE electrical interface view, Global VE sub-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 Gigabit Ethernet 0/1/0.

<HUAWEI> system-view
[~HUAWEI] isis 1
[*HUAWEI-isis-1] quit
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] isis enable 1
[*HUAWEI-GigabitEthernet0/1/0] isis timer hello 20 level-2