You can modify, disable, or remove interface-level IS-IS parameters without shutting down entities. Changes take effect immediately. Modifying the level capability on the interface causes the IS-IS protocol on the interface to restart.
To remove an interface, issue the no interface ip-int-name command. To disable an interface, issue the shutdown command in the interface context.
The following example displays interface IS-IS modification command usage. For specific interface configuration and modification examples also see, Configuring a level 1 area and Modifying a router’s level capability.
Example
config>router# isis
config>router>isis# interface ALA-1-3
config>router>isis>if# passive
config>router>isis>if# exit
config>router>isis# interface to-103
config>router>isis>if# hello-authentication-type message-digest
config>router>isis>if# hello-authentication-key secretkey
config>router>isis>if# exitThe following example displays the modified interface parameters.
A:ALA-A>config>router>isis# info
----------------------------------------------
area-id 49.0180.0001
area-id 49.0180.0002
area-id 49.0180.0003
authentication-key "//oZrvtvFPn06S42lRIJsE" hash
authentication-type password
no authentication-check
overload timeout 500 on-boot
level 1
wide-metrics-only
exit
level 2
wide-metrics-only
exit
interface "system"
exit
interface "ALA-1-2"
level-capability level-2
exit
interface "ALA-1-3"
level-capability level-1
interface-type point-to-point
passive
exit
interface "ALA-1-5"
level-capability level-1
interface-type point-to-point
exit
interface "to-103"
hello-authentication-key "DvR3l264KQ6vXMTvbAZ1mE" hash
hello-authentication-type message-digest
exit
interface "A-B"
exit
----------------------------------------------
A:ALA-A>config>router>isis#