Configuring OSPFv3 Flush LSA Source Tracing

OSPFv3 flush LSA source tracing helps improve the efficiency in locating the devices that flushed OSPFv3 LSAs.

Usage Scenario

If network-wide OSPFv3 LSAs are deleted, flush LSAs are flooded, which adversely affects network stability. In this case, source tracing must be implemented to locate the root cause of the fault immediately to minimize the impact. However, OSPFv3 itself does not support source tracing. A conventional solution is isolation node by node until the faulty node is located, but the solution is complex and time-consuming. To address this problem, enable OSPFv3 flush LSA source tracing.

The following steps are optional, and choose them as required.

Pre-configuration Tasks

Before configuring OSPFv3 flush LSA source tracing, complete the following task:

Configure an IP address for each interface to ensure that neighboring devices are reachable at the network layer.
Configure basic OSPFv3 functions.

Procedure

Run system-view
The system view is displayed.

To disable OSPFv3 flush LSA source tracing globally, run the ospfv3 flush-source-trace disable command.
Run interface interface-type interface-number
The interface view is displayed.

To disable OSPFv3 flush LSA source tracing on an interface, run the ospfv3 flush-source-trace block command.
Run quit
Return to the system view.
Run ospfv3 [ process-id ] [ vpn-instance vpn-instance-name ]
The OSPFv3 process is started, and the OSPFv3 view is displayed.
Run ospfv3 flush-source-trace port port-number
A UDP port number is specified for OSPFv3 flush LSA source tracing packets.

The OSPFv3 flush LSA source tracing port receives and sends OSPFv3 flush LSA source tracing packets, and the port is identified by a UDP port number. If the UDP port number conflicts with that of an application, you can change the UDP port number of OSPFv3 flush LSA source tracing packets using the ospfv3 flush-source-trace port command.
Run quit
Return to the system view.
Run quit
Return to the user view.
Run reset ospfv3 process-id flush-source-trace
OSPFv3 flush LSA source tracing is reset.

If a large number of OSPFv3 flush LSA source tracing statistics are stored on a device, you can run the reset ospfv3 flush-source-trace command to reset the statistics. After the command is run, all OSPFv3 flush LSA source tracing statistics are reset, and the device needs to re-negotiate the OSPFv3 flush LSA source tracing capability with neighboring devices.
Run commit
The configuration is committed.

Verifying the Configuration

Run the display ospfv3 [ process-id ] [ area area-id-integer ] flush-source-trace analysis-info command to check information about determined and suspected faulty nodes identified by OSPFv3 flush LSA source tracing.