isis hello-interval

Specifies how often an Intermediate System-to-Intermediate System (IS-IS) interface sends hello messages to its IS-IS neighbors.

Syntax

isis hello-interval { level-1 | level-2 } value

no isis hello-interval { level-1 | level-2 } value

Disabled.

level-1: Configures the hello interval for Level 1 only.
level-2: Configures the hello interval for Level 2 only.
value: Specifies the interval. Valid values range from 1 through 63 seconds. The default is 10.

Interface subtype configuration mode

IS-IS is supported on the Extreme 8820, SLX 9740, SLX 9640, and SLX 9540 devices only.

The no form of the command resets the hello interval to the default value of 10 seconds.

The following example changes the hello interval for Level 1 packets to 20 on an Ethernet interface.

device# configure terminal
device(config)# interface ethernet 1/1
device(conf-if-eth-1/1)# isis hello-interval level-1 20

The following example changes the hello interval for Level 2 packets to 40 on a loopback interface.

device# configure terminal
device(config)# interface loopback 1
device(config-Loopback-1)# isis hello-interval level-2 20