Configuring global IS-IS parameters

Commands and parameters configured on the global level are inherited to the interface levels. Parameters specified in the interface and interface-level configurations take precedence over global configurations.

Example: Command usage to configure global-level IS-IS

config>router# isis
    config>router>isis#
    config>router>isis# level-capability level-2
    config>router>isis# authentication-check
    config>router>isis# authentication-type password
    config>router>isis# authentication-key test 
    config>router>isis# overload timeout 90
    config>router>isis# traffic-engineering

Example: Modified global-level configuration output

A:ALA-A>config>router>isis# info
----------------------------------------------
        level-capability level-2
        area-id 49.0180.0001
        area-id 49.0180.0002
        area-id 49.0180.0003
        authentication-key "H5KBAWrAAQU" hash
        authentication-type password
        overload timeout 90 
        traffic-engineering
----------------------------------------------
A:ALA-A>config>router>isis#