Re: Bird 2.0.8 + uClibc-ng, BGP RR + OSPF - OSPF falls to 'Alone' state at BGP routes recalculation

[Maria Matějka]

Hello!

Do you have any log? Are you able to replicate such a behavior consistently? If so, could you please share an exact configuration with us to put it into our testbed?

You can also enable "debug protocols all;" in your conf file. This produces a s***load of logs, yet it should yield enough clues to isolate the problem and find a suitable solution.

Thank you for your report! 

Maria 

On September 24, 2021 3:13:45 PM UTC, Andrew <nitr0 at seti.kr.ua> wrote:
>Hi all.
>
>I have Bird 2.0.8 on one of border routers, it runs with kernel 5.10.26 
>and uClibc-ng 1.0.38. It acts as RR and receives FV from uplink + FV 
>from second border (also RR), and it has 2 routing tables (one which 
>receives BGP routes, then routes sinks to main table.
>
>When second border's BGP link fails, Bird starts to rebuild routing 
>table, and acts quite strange (too slow birdc response, etc) and after 
>~5 minutes OSPF looses neighbors and falls to state 'Alone'. It can be 
>in that state for hours, and initiated only after bird restart (I didn't 
>tried protocol restart - usually I don't wait for end of route table 
>recalculation).
>
>When table recalculation is in progress, perf top shows that 40+% CPU 
>time is used by malloc routine.
>
>Are there fixes in trunk for such behavior? If no - what extra info is 
>needed for debugging?
>

-- 
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