(Optional) Setting Timers for mLDP P2MP FRR Link Protection

Timers can be set for mLDP P2MP FRR link protection, which helps properly perform a traffic switchover.

Context

The following timers can be set for mLDP P2MP FRR link protection:

Delay timer for deleting mLDP P2MP LSP labels: This timer delays in deleting labels for a faulty mLDP P2MP LSP, preventing local link flapping from spreading globally.
Timer for a downstream node to wait for an MBB Notification message sent by an upstream node: Within this timer period, a downstream node confirms that a branch LSP is successfully established only after receiving an MBB Notification message replied by an upstream node during MBB LSP establishment. This timer sets the period of time for the downstream node to wait for an MBB Notification message.
Timer for delaying an MBB LSP switchover: After an MBB LSP is established, LSP switching is delayed to ensure the proper traffic switching on the forwarding and control planes.

Default timer values are recommended.

Procedure

Configure a delay timer for deleting mLDP P2MP LSP labels.
1. Run system-view
  The system view is displayed.
2. Run mpls ldp
  The MPLS-LDP view is displayed.
3. Run mldp p2mp
  mLDP P2MP is enabled globally.
4. Run mldp label-withdraw-delay delay-time-value
  A delay timer is set for deleting mLDP P2MP LSP labels.
5. Run commit
  The configuration is committed.
Configure a timer for a downstream node to wait for an MBB Notification message sent by an upstream node.
1. Run system-view
  The system view is displayed.
2. Run mpls ldp
  The MPLS-LDP view is displayed.
3. Run mldp p2mp
  mLDP P2MP is enabled globally.
4. Run mldp make-before-break
  The MBB capability is configured.
5. Run mldp make-before-break timer wait-ack wait-ack-time-value
  A timer is set for a downstream node to wait for an MBB Notification message sent by an upstream node.
6. Run commit
  The configuration is committed.
Configure a timer for delaying an MBB LSP switchover.
1. Run system-view
  The system view is displayed.
2. Run mpls ldp
  The MPLS-LDP view is displayed.
3. Run mldp p2mp
  mLDP P2MP is enabled globally.
4. Run mldp make-before-break
  The MBB capability is configured.
5. Run mldp make-before-break timer switch-delay switch-delay-time-value
  A timer for delaying an MBB LSP switchover is configured.
6. Run commit
  The configuration is committed.

Parent Topic: Configuring mLDP P2MP FRR Link Protection

Copyright © Huawei Technologies Co., Ltd.

Copyright © Huawei Technologies Co., Ltd.

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