Managing an IS-IS Area Address
  
  
    
      IS-IS was not originally designed for IP routing. Some aspects of CLNP
        routing, such as system IDs and area addresses, exist in the IP extension of IS-IS. The
        IS-IS area address is required to identify the area in which the router participates.
     
    - 
        Before you can configure the area address,
you must create the IS-IS routing process, which is also called
an area, using the following command:
        create isis
          area area_name  
- 
        To add an IS-IS area address to the router, use the
          following command:
        configure
          isis area area_name add area-address area_address  
- 
        To delete an IS-IS area address from a router, use the
          following command:
        configure
          isis area area_name delete area-address area_address  
           Note    The  ExtremeXOS software implementation of IS-IS
            supports no more than three area addresses.