R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

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Configuring IS-IS GR
Restarting IS-IS on a router will cause network disconnections and route reconvergence.
With the GR feature, the restarting router (known as the "GR restarter") can notify the event to its GR
capable neighbors. GR capable neighbors (known as "GR helpers") 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 this process, the network keeps stable.
To configure GR on the GR restarter and GR helper:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable IS-IS and
enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
Disabled by default.
3. Enable the GR
capability for IS-IS.
graceful-restart Disabled by default.
4. Set the Graceful
Restart interval.
graceful-restart interval timer
300 seconds by default.
The Graceful Restart interval is set as the
holding time in the hello PDUs. Within the
interval, the neighbors will keep their
adjacency with the GR restarter.
5. Suppress the SA bit
during restart.
graceful-restart suppress-sa
Optional.
By default, the SA bit is not suppressed.
By enabling the GR restarter to suppress the
Suppress-Advertisement (SA) bit in the hello
PDUs, the neighbors will still advertise their
adjacency with the GR restarter.
Enabling IS-IS SNMP trap
This task enables IS-IS to generate traps and send them to the information center of the device. The
information center determines whether to output the traps and where to output. For more information
about information center, see Network Management and Monitoring Configuration Guide.
To enable IS-IS SNMP trap:
Ste
p
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. Enable SNMP trap.
is-snmp-traps enable Enabled by default.