H3C Technologies H3C SR8800 - Manual (Page 323)

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Step Command Remarks
3. Disable interfaces from
receiving and sending
OSPFv3 packets.
silent-interface { interface-type
interface-number | all }
Not disabled by default
NOTE:
•
Multiple OSPFv3 processes can disable the same interface from receiving and sending OSPFv3 packets.
Using the silent-interface command disables only the interfaces associated with the current process.
• After an OSPF interface is set to silent, direct routes of the interface can still be advertised in
Intra-Area-Prefix-LSAs via other interfaces, but other OSPFv3 packets cannot be advertised. No
neighboring relationship can be established on the interface. This feature can enhance the adaptability
of OSPFv3 networking.
Enabling the logging of neighbor state changes
To enable the logging of neighbor state changes:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter OSPFv3 view. ospfv3 [ process-id ] N/A
3. Enable the logging of
neighbor state changes.
log-peer-change Enabled by default
Configuring OSPFv3 GR
NOTE:
You cannot configure OSPFv3 GR after configuring OSPFv3 virtual links, because they are not supported
at the same time.
Graceful Restart ensures the continuity of packet forwarding when a routing protocol restarts or an
active/standby switchover occurs:
• GR Restarter—Graceful restarting router. It must be Graceful Restart capable.
• GR Helper—The neighbor of the GR Restarter. It helps the GR Restarter to complete the GR process.
To prevent service interruption after a master/backup switchover, a GR Restarter running OSPFv3 must
complete the following tasks:
• Keep the GR Restarter forwarding entries stable during reboot.
• Establish all adjacencies and obtain complete topology information after reboot.
After the active/standby switchover, the GR Restarter sends a Grace-LSA to tell its neighbors that it
performs a GR. Upon receiving the Grace-LSA, the neighbors with the GR Helper capability enter the
helper mode (and are called “GR Helpers”). Then, the GR Restarter retrieves its adjacencies and LSDB
with the help of the GR Helpers.