isis hello-interval
Use this command to set the Hello interval in seconds. The Hello-interval is set with the hello-multiplier (see isis hello-multiplier command).
Configuring this command changes the time interval between two consecutive Hello transmissions. If a device receives its own LSP with a maximum sequence number, then it suspends ISIS for the hold interval. DIS sends Hello transmissions at three times the rate than non-DIS. If ISIS is elected as DIS on this interface, ISIS sends Hello every 3.3 seconds.
If minimal keyword is specified, Holding timer in Hello PDU is set to 1 second and Hello interval is calculated by dividing by the hello-multiplier. For example, if the hello-multiplier is configured as 4 and hello-interval minimal is the command used, an Hello PDU is sent every 250 milliseconds.
Use the no parameter to set the Hello interval to the default.
Command Syntax
isis hello-interval <1-65535> (level-1|level-2|)
isis hello-interval minimal (level-1-only|level-2-only|level-1-2)
no isis hello-interval (level-1|level-2|)
no isis hello-interval minimal
Parameters
<1-65535>
Specify the hello interval in seconds.
minimal
Specify the holding-time as 1 second.
level-1
Specify Level-1 CSNP.
level-2
Specify Level-2 CSNP.
level-1-only
Specify only Level-1 CSNP.
level-2-only
Specify only Level-2 CSNP.
level-1-2
Specify only Level-1-2 CSNP.
Default
By default, ISIS uses 10 seconds for the interval and the interval is applied to both level-1 and level-2.
Command Mode
Interface mode
Applicability
This command was introduced before OcNOS version 1.3.
Examples
#configure terminal
(config)#interface eth0
(config-if)#isis hello-interval 5 level-1
(config-if)#isis hello-interval minimal level-1-only
Last modified date: 08/28/2023