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Minimum IS-IS Configuration

For IS-IS to run on the router, you must enable IS-IS on the router, configure a network entity title (NET) on one of the router’s interfaces (preferably the loopback interface, lo0), and configure the ISO family on all interfaces on which you want IS-IS to run. When you enable IS-IS, Level 1 and Level 2 are enabled by default. The following is the minimum IS-IS configuration. In the address statement, address is the NET:



interfaces {


lo0 {


unit logical-unit-number {


family iso {

address address;
}


}


}





interface-type-fpc/pic/port {


unit logical-unit-number {
family iso;
}


}


}
protocols {



isis {

interface all;
}


}

Note: To create the IS-IS interface, you must also configure IS-IS at the [edit protocols isis interface interface-name] hierarchy level. If you want the JUNOS software to create IS-IS interfaces automatically, include the interface all option at the [edit protocols isis] hierarchy level.

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