Muhanna,
You can configure your router to use CLNS Routing to use ISIS. You will need to use the following commands:
globally turn on CLNS Routing with:
clns routing
Assign logical subinterfaces to which ever port you wish to connect to devices using CLNS and assign:
clns router isis TID !where TID is the target id
isis circuit-type level-2-only
isis metric 63
You can decide on what level or routing is needed and what metric you wish to assign to a specific interface.
globally you will need to assign net statements with the NSAP address of each device. For example:
router isis TID
net NSAP
is-type level-1
If you are connecting end systems, such as a management server to your network you replace is with es.
In IS-IS communications routing is allowed where ES-IS communications routing is not allowed to be passed beyond the ES.
Some useful trouble shooting commands;
show clns neighbors detail
show clns route
debug clns packet
ping NSAP
Pay particular attention to the NSAP addresses and their selector as well as the ES-IS and IS-IS settings on external systems. Most systems that are designed for IS-IS have internal configuration parameters that allow you to turn on/off the IS-IS functionality of the system.
