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priority (Protocols IS-IS)



Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.

Statement introduced in Junos OS Release 9.0 for EX Series switches.

Statement introduced in Junos OS Release 12.1 for the QFX Series.

Statement introduced in Junos OS Release 14.1X53-D20 for the OCX Series.


Configure the interface’s priority for becoming the designated router. The interface with the highest priority value becomes that level’s designated router.

The priority value is meaningful only on a multiaccess network. It has no meaning on a point-to-point interface.

A routing device advertises its priority to become a designated router in its hello packets. On all multiaccess networks, IS-IS uses the advertised priorities to elect a designated router for the network. This routing device is responsible for sending network link-state advertisements, which describe all the routing devices attached to the network. These advertisements are flooded throughout a single area.

A routing device’s priority for becoming the designated router is indicated by an arbitrary number from 0 through 127. Routing devices with a higher value are more likely to become the designated router.


number—Priority value.

Range: 0 through 127

Default: 64

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.