When we use Huawei NE series routers, we sometimes encounter problems. How can these problems be solved? We provide the Troubleshooting Guide to help you.
If you encounter the BFD Session Cannot Go Up, perform the following steps:
1. Run the display current-configuration configuration bfd-session command to check whether the local discriminator of one end is the same as the remote discriminator of the other end.
§ If the two discriminators are the same, go to Step 2.
§ If the discriminators are different, run the discriminator command to configure the local and remote discriminators for the BFD session and commit the configuration. Then run the display bfd session all command to check whether the BFD session is Up.
o If the State field is Up, the BFD session Go to Step 6.
o If the State field is not Up, go to Step 2.
2. Run the display bfd statistics session all command several times to check the statistics about the BFD packets of the BFD session.
. If the value of the Down Count field increases, the BFD session flaps. Go to Step 4.
a. If the value of the Received Packets field does not increase, check whether the value of the Received Bad Packets field increases.
o If the value of this field increases, the BFD packets have been received and discarded. Then, go to Step 5.
o If the value of this field does not increase, the BFD packets have not been received. Go to Step 3.
b. If the value of the Send Packets field does not increase, check whether the value of the Send Bad Packets field increases.
o If the value of this field increases, the BFD packets sent by the BFD session have been discarded. Then, go to Step 5.
o If the value of this field does not increase, the BFD packets failed to be sent. Go to Step 3.
3. Run the ping command on one end to ping the other end of the BFD session.
§ If the ping is successful, the link is reachable. Go to Step 4.
4. Run the display current-configuration configuration bfd-session command to view the min-tx-interval and min-rx-interval fields to check whether the BFD detection period is longer than the delay on the link.
§ If the BFD detection period is shorter than the delay, run the detect-multiplier, min-rx-interval, and min-tx-interval commands in the BFD session view to adjust the values to make the BFD detection timer longer than the delay. Then, go to Step 6.
§ If the BFD detection time is longer than the delay time on the link, go to Step 5.
5. If the fault persists, collect the following information and contact technical support personnel.
§ Results of this troubleshooting procedure
§ Configuration files, log files, and alarm files of the devices
For more troubleshooting cases, see: NE40E Troubleshooting Guide V4.0 (VRPv8)
https://support.huawei.com/enterprise/en/doc/EDOC1000177634
