isis priority

Use this command to configure the priority used to determine which router on a LAN is the designated router.

Syntax

isis priority priority [level-1 | level-1-2 | level-2]

no isis priority priority [level-1 | level-1-2 | level-2]

Parameters

`priority`	Specifies the interface priority used in selecting the designated router. Valid values are 0 - 127. The default value is 64.
level-1	(Optional) Specifies that the configured priority is applied to level 1 for the interface.
level-1-2	(Optional) Specifies that the configured priority is applied to both level 1 and level 2 for the interface (Default).
level-2	(Optional) Specifies that the configured priority is applied to level 2 for the interface.

Defaults

If an IS-IS level is not specified, the level type defaults to both level 1 and level 2.

Mode

Interface configuration.

Usage

The priority is used to determine the designated router. The router with the highest priority becomes the designated router. IS-IS does not support the concept of a backup designated router. Setting the priority to 0 does not prevent this system from becoming the designated router. If priorities are equal, the interface with the highest MAC address breaks the tie.

The “no” form of this command resets the interface priority to the default value of 64.

Example

This example shows how to configure VLAN 100 for a priority of 80:

System(rw)->configure
System(rw-config)->interface vlan 100
System(rw-config-intf-vlan.0.100)->isis priority 80
System(rw-config-intf-vlan.0.100)->

Published May 2016prev | next

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