isis priority

Determines the priority of the interface for being elected as a Designated IS.

Syntax

isis priority { level-1 | level-2 } value
no isis priority { level-1 | level-2 } value

Command Default

The default is 64.

Parameters

level-1
Sets the priority for Level 1 only.
level-2
Sets the priority for Level 2 only.
value
Specifies the priority. Valid values range from 0 through 127. The default is 64.

Modes

Interface subtype configuration mode

Usage Guidelines

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

You can configure the same priority for both Level-1 and Level-2 or you can configure a different priority for each level. If two or more devices have the highest priority within a given level, the device with the highest MAC address becomes the Designated IS for that level.

You can set the IS-IS priority on an individual interface basis only. You cannot set the priority globally.

The no form of the command resets the priority value to the default value of 64.

Examples

The following example changes the priority for Level 1 packets for an Ethernet interface.

device# configure terminal
device(config)# interface ethernet 1/1
device(conf-if-eth-1/1)# isis priority level-1 100

The following example changes the hello multiplier for Level 2 packets for a loopback interface.

device# configure terminal
device(config)# interface loopback 1
device(config-Loopback-1)# isis priority level-2 80