H3C Technologies H3C S7500E Series Switches - Manual (Page 181)

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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:
To do… Use the command... Remarks
Enter system view 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 quit ––
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.
Configuring IS-IS GR
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.
You can enable the GR Restarter to suppress the Suppress-Advertisement (SA) bit in the hello PDUs.
In this way, its neighbors will still advertise the adjacencies within the specified period.
Follow these steps to configure GR on the GR Restarter and GR Helper respectively:
To do… Use the command… Remarks
Enter system view system-view —