Configuring system ID to host name mappings
A 6-byte system ID in hexadecimal notation uniquely identifies a router or host in an IS-IS network. To make a system ID easy to read, the system allows you to use host names to identify devices. It also provides mappings between system IDs and host names.
The mappings can be configured manually or dynamically. Follow these guidelines when you configure the mappings:
To view host names rather than system IDs by using the display isis lsdb command, you must enable dynamic system ID to host name mapping.
If you configure both dynamic mapping and static mapping on a router, the host name specified for dynamic mapping applies.
Configuring a static system ID to host name mapping
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter IS-IS view. | isis [ process-id ] [ vpn-instance vpn-instance-name ] | N/A |
3. Configure a system ID to host name mapping for a remote IS. | is-name map sys-id map-sys-name | A system ID can correspond to only one host name. |
Configuring dynamic system ID to host name mapping
Static system ID to host name mapping requires you to manually configure a mapping for each router in the network. When a new router is added to the network or a mapping must be modified, you must configure all routers manually.
When you use dynamic system ID to host name mapping, you only need to configure a host name for each router in the network. Each router advertises the host name in a dynamic host name CLV to other routers so all routers in the network can have all mappings.
To help check the origin of LSPs in the LSDB, you can configure a name for the DIS in a broadcast network.
To configure dynamic system ID to host name mapping:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter IS-IS view. | isis [ process-id ] [ vpn-instance vpn-instance-name ] | N/A |
3. Specify a host name for the IS and enable dynamic system ID to host name mapping. | is-name sys-name | By default, no host name is specified for the router. |
4. Return to system view. | quit | N/A |
5. Enter interface view. | interface interface-type interface-number | N/A |
6. Configure a DIS name. | isis dis-name symbolic-name | By default, no DIS name is configured. This command takes effect only on a router enabled with dynamic system ID to host name mapping. This command is not available on P2P interfaces. |