Configuring the Dynamic Host Name Mapping of IS-IS

To ensure the visualization and convenience of routine maintenance and use, you can set the name of the IS-IS process for the IS-IS router, and enable the mapping between the process name and system ID.

Context

The system ID is adopted by IS-IS as a unique identifier for the host or router in the area. The length of the system ID is 6 bytes. When the network administrator checks the status of neighbor relationships, IS-IS routing tables, and content of the LSDB, the system ID and LSP identifier in dotted decimal notation is not visualized and it is inconvenient for checks.

The host name mapping function provides the mapping between system IDs and host names. The router running IS-IS maintains a mapping table from host names to system IDs. During the maintenance, management, or network fault diagnosis, the host name is more visualized and easy-to-memorize than the system ID.

After the dynamic host name mapping function is enabled, each router on the IS-IS network only needs to set the host name of itself. The specified host name is advertised in constant linear velocity (CLV). Then, on the IS-IS network, the routers enabling the dynamic host name mapping function receive the mapping relationships of the system IDs and host names of other routers, and generate mapping tables.

Procedure

Configure the host name of the local IS.
1. Access the system view.
  system-view
2. Access the IS-IS process view.
  isis [ process-id ]
3. Configure the host name of the local IS.
  is-name symbolic-name
  
  A name is specified for the local IS-IS process, and the mapping from the system ID to the host name is enabled. The specified name is advertised in LSP packets to other routers in the area.
  
  To enable the dynamic host name mapping of the IS-IS process, you should perform the previous command first; otherwise, after the display command is executed, the mapping relationship between the system ID and host name cannot be displayed in the output information.
Configure the host name of the remote IS.
1. Access the system view.
  system-view
2. Access the IS-IS process view.
  isis [ process-id ]
3. Configure the host name of the remote IS.
  is-name map system-id symbolic-name
  
  A name is specified for the remote IS-IS router on the local host. One system ID only corresponds to one name.
  
  If any router on the network advertising the mapping relationship between the host name and system ID in LSP packets, the mapping relationship overwrites the static mapping of the local router.
Configure the host name for the DIS.
1. Access the system view.
  system-view
2. Access the interface view.
  interface interface-type interface-number
3. Configure the host name of the DIS.
  isis dis-name symbolic-name
  
  This configuration takes effect only on the DIS. The interface on which isis dis-name command is used advertises the configured name to the network connected to the interface through a pseudo-node LSP. The configured name is thus associated with the system ID of a specified router. This command does not take effect on P2P interfaces.