ospf lsu-flood-control

Use ospf lsu-flood-control to enable OSPF to limit the LSU transmit rate.

Use undo ospf lsu-flood-control to disable OSPF to limit LSU transmit rate.

Syntax

ospf lsu-flood- control [ interval count ]

undo ospf lsu-flood-control

Default

OSPF does not limit the LSU transmit rate.

Views

System view

Predefined user roles

network-admin

Parameters

interval: Specifies the LSU transmit interval in the range of 10 to 1000 milliseconds. The default value is 30.

count: Specifies the maximum number of LSUs that can be sent at each interval, in the range of 1 to 1000. The default value is 50.

Usage guidelines

During LSDB synchronization, if the local router has multiple neighbors, it must send many LSUs to each neighbor. When a neighbor receives excessive LSUs within a short time period, the following events might occur:

• The performance of the neighbor is degraded because too much system resources are occupied for LSU packet processing.

• The neighbor drops hello packets used for maintaining the neighbor relationship because it is busy dealing with the LSUs. As a result, the neighbor relationship is torn down. To reestablish a relationship to the neighbor, the local router must send more LSUs to the neighbor. This exacerbates the performance degradation.

To prevent this problem, execute this command to limit the global LSU transmit rate.

Inappropriate use of this command might cause abnormal routing. As a best practice, execute this command with the default values.

Examples

# Enable OSPF to limit the LSU transmit rate, and configure all OSPF interfaces to send 60 LSUs every 40 milliseconds.

<Sysname> system-view
[Sysname] ospf lsu-flood-control 40 60