Configuring Is-Is - H3C S5800 Series Configuration Manual

To do...
Specify a host name for the
router
Return to system view
Enter interface view
Configure a DIS name
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...
Enter system view
Enable IS-IS, and enter
IS-IS view
Enable the GR capability
for IS-IS
Set the Graceful Restart
interval
Suppress the SA bit
during restart
Use the command...
is-name sys-name
quit
interface interface-type
interface-number
isis dis-name symbolic-name
Use the command...
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
graceful-restart
graceful-restart interval timer
graceful-restart suppress-sa
5-36
Remarks
Required
No specified by default.
––
––
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.
Remarks
—
Required
Disabled by default
Required
Disabled by default
Required
300 seconds by default
Optional
By default, the SA bit is not suppressed.