(Optional) Restricting the Flooding of OSPF Update LSAs

To maintain stable OSPF neighbor relationships, you can restrict the flooding of update LSAs on a local device, so that its neighbors will not discard Hello packets due to a great number of update LSAs.

Context

An OSPF neighbor receives a large number of Update packets at a short time if the device has multiple neighbors or a large number of update LSAs are flooded by a local device. In this case, the neighbor is busy with processing burst Update packets and discards the Hello packets for maintaining neighbor relationships. As a result, the OSPF neighbor relationships will be torn down unexpectedly. If such a problem occurs, the neighbors will exchange many packets to reestablish neighbor relationships, deteriorating system performance.

To resolve the problem, you can restrict the flooding of OSPF update LSAs by setting the maximum number of Update packets that can be sent at each interval during update LSA flooding.

The parameter settings of this command directly affect the flooding speed. If the parameters are improperly set, LSAs may not be synchronized in time, which affects the routing of the entire network. Therefore, this function is not recommended unless otherwise required.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id ]

    The OSPF view is displayed.

  3. Run flooding-control [ number number-value | timer-interval timer-interval-value ] *

    OSPF is configured to restrict the flooding of update LSAs.

  4. Run commit

    The configuration is committed.

Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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