is-type

Syntax

is-type { level-1 | level-1-2 | level-2 }

no is-type { level-1 | level-1-2 | level-2 }

The device operates as both a Level 1 (intra-area) and a Level 2 (interarea) device.

level-1: Specifies that the device performs only Level 1 (intra-area) routing.
level-1-2: Specifies that the device performs both Level 1 and Level 2 routing.
level-2: Specifies that the device performs only Level 2 (interarea) routing.

IS-IS router 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 enables support for both IS-IS levels, if one level has been disabled. Alternatively, the level-1-2 parameter can be used.

The following example changes the IS-IS level globally to Level-1 only.

device# configure terminal
device(config)# router isis
device(config-isis-router)# is-type level-1

The following example changes the IS-IS level globally to Level-2 only.

device# configure terminal
device(config)# router isis
device(config-isis-router)# is-type level-2

The following example changes the IS-IS level globally to Level-1 and Level-2 if support for one level has previously been disabled.

device# configure terminal
device(config)# router isis
device(config-isis-router)# is-type level-1-2