H3C Technologies H3C S12500 Series Switches - Manual (Page 179)

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Step Command Remarks
3. Specify the routing domain
authentication mode and
password.
domain-authentication-mode
{ md5 | simple } [ cipher ]
password [ ip | osi ]
By default, no routing domain
authentication is configured.
Configuring IS-IS GR
IMPORTANT:
•
The IS-IS GR and IS-IS NSR features are mutually exclusive.
• Before performing a master/backup switchover between IRF member switches, configure the irf
mac-address persistent always command to prevent bridge MAC address changes that can cause IS-IS
GR failure after the switchover.
Restarting IS-IS on a router causes transient network disconnection and route reconvergence.
With the Graceful Restart (GR) feature, the restarting router—known as the GR restarter—can notify the
event to its GR capable neighbors, GR capable neighbors—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 this process, the network keeps stable.
To configure GR on the GR restarter and GR helper:
Step 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.