3com S7906E Manuel De Montage

 

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Configure a system ID to host 
name mapping for a remote IS 

is-name map sys-id 
map-sys-name 

Required 

A system ID can only 
correspond to a host name. 

 

You need to configure a static system ID to host name mapping for any other router in a network. When 

a new router is added into the network or a mapping needs to be modified, you need to perform 

configuration on all routers.  

In this case, you can configure dynamic system ID to host name mapping. To do so, you need to 

configure a host name for each router in the network. Each router advertises the host name in dynamic 

host name CLVs to other routers. At last, all routers in the network have all the mappings to generate a 

mapping table. 

In addition, you can configure a name for the DIS in a broadcast network to help check the origin of 

LSPs in the LSDB. 

Follow these steps to configure dynamic system ID to host name mapping: 

Enter system view 

–– 

Enter IS-IS view 

isis [ process-id ] 
[ vpn-instance 
vpn-instance-name ] 

–– 

Specify a host name for 
the router 

is-name sys-name 

Required 

No specified by default. 

Return to system view 

–– 

Enter interface view 

interface interface-type 
interface-number 

–– 

Configure a DIS name 

isis dis-name symbolic-name 

Optional 

Not configured by default. 

This command takes effect only on a 
router with dynamic system ID to host 
name mapping configured. 

This command is not supported on 
P2P interfaces. 

 

Restarting ISIS on a router will cause network disconnections and route re-convergence. 

With the Graceful Restart (GR) feature, the restarting router, known as the GR restarter, can notify the 

event to its GR capable neighbors, which, known as the GR helpers, will keep their adjacencies with the 

router within a configurable GR interval. After the restart, the router contacts its neighbors to retrieve its 

routing table.  

During the whole process, the network keeps stable.