[Contents] [Prev] [Next] [Index] [Report an Error]

Disabling IS-IS on a Level

By default, IS-IS is enabled for IS-IS areas on all enabled interfaces on which the ISO protocol family is enabled (at the [edit interfaces interface unit logical-unit-number] hierarchy level). To disable IS-IS at any particular level on an interface, include the disable statement:




disable;

For a list of hierarchy levels at which you can configure this statement, see the statement summary section for this statement.

Enabling IS-IS on an interface (by including the interface statement at the [edit protocols isis] hierarchy level), disabling it (by including the disable statement), and not actually having IS-IS run on an interface (by including the passive statement) are mutually exclusive states.

Example: Disabling IS-IS on a Level

On SONET/SDH interface so-0/0/0, enable IS-IS for Level 1 only. With this configuration, tracing messages periodically will indicate that IS-IS is creating Level 2 link-state PDUs. However, because IS-IS for Level 2 is disabled, these link-state PDUs are never distributed to neighboring routers.



protocols {


isis {


traceoptions {
file isis size 1m files 10;
flag spf;
flag lsp;
flag error;
}




interface so-0/0/0 {


level 2 {
disable;
}


}


}


}

[Contents] [Prev] [Next] [Index] [Report an Error]