l If the Line protocol current state field displays DOWN(BFD status down), the interface
status is set to BFD status down after the BFD session detects a link fault. Then, go to Step
2.
l If the Line protocol current state field displays UP but the interface cannot forward packets,
the forwarding module is faulty. See the section The Ping Operation Fails to rectify the
forwarding fault.
Step 2 Run the display bfd session all command to view the status of the BFD session.
l If the BFD session is Down, go to Step 3.
l If the BFD session is Up, go to Step 4.
Step 3 Run the display current-configuration configuration bfd-session command to check that the
process-interface-status command is configured.
l If the process-interface-status command is configured, the interface is set to DOWN(BFD
status down) because the BFD session detected a fault and went Down.
l If the process-interface-status command is not configured, go to Step 4.
Step 4 If the fault persists, collect the following information and contact Huawei technical support
personnel.
l Results of the preceding troubleshooting procedure.
l Configuration files, log files, and alarm files of the devices.
----End
Relevant Alarms and Logs
Relevant Alarms
None.
Relevant Logs
None.
11.2.3 Changed BFD Session Parameters Do Not Take Effect
Common Causes
This fault is commonly caused by the following:
l After parameters of a BFD session have been changed, changed configurations are not
committed.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 11 Reliability
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
331
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