isis auth-check

Enables authentication checking for an IS-IS interface.

Syntax

isis auth-check { level-1 | level-2 } disable

no isis auth-check { level-1 | level-2 } disable

IS-IS authentication checking is enabled by default.

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 disables IS-IS authentication checking for an IS-IS interface.

The following example disables IS-IS authentication checking for Level 1 packets for an IS-IS Ethernet interface.

device# configure terminal
device(config)# interface ethernet 1/1
device(conf-if-eth-1/1)# isis auth-check disable

The following example re-enables IS-IS authentication checking for Level 2 packets for an IS-IS loopback interface.

device# configure terminal
device(config)# interface loopback 1
device(config-Loopback-1)# isis auth-check