Skip to main content (Press Enter).
Skip auxiliary navigation (Press Enter).
Terms and Conditions
Advance with us!
Skip main navigation (Press Enter).
Network Management & Authentication
Switching & Routing
Training, Documentation, & General Discussions
Switching & Routing
Back to discussions
sort by most recent
sort by thread
Hello community, We have 2 bfd sessions for OSPF and can see the missed-hellos counter is increment...
No reply? Sounds that this issue is new to community or TAC itself? No worries. I was able ...
Posted 01-11-2018 14:43
We have 2 bfd sessions for OSPF and can see the missed-hellos counter is incremented and resulting in bfd and ofpf to go down when 3 missed-hellos are reported.
I also see the counter
Rx session Not Found
as non-zero in the output of show bfd counters.
Please help me to troubleshoot and understand
1) Missed-hellos means that the neighbor did not sent the bfd hello or does it mean that neighbor sent the hello but EXOS did not process it. I did not see any good explanation in the EXOS reference document.
2) What is Rx session Not Found here.
It is BD8806 (EXOS 16.2) having two bfd sessions (ospf ) with 300msx3 timers and I did not see any other abnormal thing which can bring the bfd down.
Any responses on the troubleshooting are highly appreciated.
Thanks in advance
RE: bfd missed-hellos
Posted 01-16-2018 13:14
No reply? Sounds that this issue is new to community or TAC itself?
I was able to find out that it is the switch itself which is actually creating issues for the missed-hellos.
The far end node and the switch are exchanging bfd hellos at expected intervals. This is proved by the port capture. bfd timers were increased and the missed hellos count was improved by almost 50%.
Successfully replicated the scenario with BD-Juniper and BD-Ericsson SmartEdge. Even Extreme TAC was also able to simulate. The case is now with Engineering to decode the problematic area.
New Best Answer
This thread already has a best answer. Would you like to mark this message as the new best answer?
LACP Counters, big difference between RX-Ok
BFD on LAG
Igmp snoop timers
Privacy & Terms
Copyright 2020. All rights reserved.
Site powered by
Site Design by
Powered by Higher Logic