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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Dynamic BFD Session Fails to Be Created

Dynamic BFD Session Fails to Be Created

Common Causes

This fault is commonly caused by one of the following:
  • BFD is not enabled for the protocol.

  • The route to the peer of the BFD session does not exist in the routing table.

  • The interface is prohibited from creating a BFD session.

Troubleshooting Flowchart

Figure 23-6  Troubleshooting flowchart for the fault that a dynamic BFD session fails to be created

Troubleshooting Procedure



Save the results of each troubleshooting step. If your troubleshooting fails to correct the fault, you will have a record of your actions to provide Huawei technical support personnel.


  1. Run the display current-configuration configuration bfd command to check that BFD is enabled for a protocol.

    • If BFD is not enabled for a protocol, enable BFD. Then, go to Step 2.

    • If BFD is enabled, go to Step 3.

  2. Run the display bfd session all command to view the state field.

    • If the state field in the command output is Up, it indicates that the BFD section has been created.

    • If the state field in the command output is not Up, go to step 3.

  3. Run the display ip routing-table command to check whether the route of the link detected by the BFD session exists.

    • If the route exists, go to step 4.

    • If the route does not exist, the BFD session associated with the protocol fails to be created. see the section The Ping Operation Fails.

  4. Run the interfaceinterface-typeinterface-number command to enter the view of the existing interface, then run the display this command to check that a command is configured to disable an interface to dynamically create a BFD session.

    • If such a command is configured, Run the undo ospf bfd block command to enable the interface to dynamically create a BFD session. Then, run the display bfd session all command to check whether the BFD session is Up. If the session is not up, go to step 5.

    • If such a command is not configured, go to step 5.

  5. If the fault persists, collect the following information and contact technical support personnel.

    • Results of the preceding troubleshooting procedure.
    • Configuration files, log files, and alarm files of the devices.

Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 451620

Downloads: 4311

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