Problem to receive an announcement in BIRD.

[Maria Jan Matějka]

By default yes. I don't know why your peers do announce the actual routes and what is written in your config and what you want. What you provided, seems legit by default.

Maria

On September 2, 2018 8:59:17 AM GMT+02:00, Marcio <marciovinicius.santos at uniriotec.br> wrote:
>Yes, i have. This is a problem? BGP don't avoid loops automatically
>finding
>it own ASN in AS PATH?
>
>Em dom, 2 de set de 2018 03:27, Maria Jan Matějka <jan.matejka at nic.cz>
>escreveu:
>
>>
>>
>> Now there is one route originated from R.
>>
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR: Got UPDATE
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR > added [best]
>10.3.1.0/24
>> >> > unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> kernel1 < replaced 10.3.1.0/24
>> >unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR < rejected by protocol
>> >> > 10.3.1.0/24
>> >> > unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> R8 < replaced 10.3.1.0/24
>unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> R8: Sending UPDATE
>>
>> Here S added better route and it was propagated to kernel and R. S
>doesn't
>> send it back.
>>
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR: Got UPDATE
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR > removed [replaced]
>> >> > 10.3.1.0/24
>> >> > unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> kernel1 < replaced 10.3.1.0/24
>> >unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR < added 10.3.1.0/24
>unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> R8 < rejected by protocol
>> >10.3.1.0/24
>> >> > unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> R8 < removed 10.3.1.0/24 unicast
>> >> > 2018-09-01 21:21:08.000 <TRACE> SDNRTR: Sending UPDATE
>> >> > 2018-09-01 21:21:08.000 <TRACE> R8: Sending UPDATE
>>
>> Here S sent another route (replacing its previous one) which came out
>> worse even than the previous from R. So the R's route is announced to
>S and
>> withdraw to R.
>>
>> >> > 2018-09-01 21:21:08.001 <TRACE> R8: Got UPDATE
>> >> > 2018-09-01 21:21:08.001 <TRACE> R8 > removed [sole] 10.3.1.0/24
>> >> > unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> kernel1 < removed 10.3.1.0/24
>> >unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> SDNRTR < removed 10.3.1.0/24
>> >unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> SDNRTR: Sending UPDATE
>>
>> R8 withdraws its route.
>>
>> >> > 2018-09-01 21:21:08.001 <TRACE> R8: Got UPDATE
>> >> > 2018-09-01 21:21:08.001 <TRACE> R8 > added [best] 10.3.1.0/24
>> >unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> kernel1 < added 10.3.1.0/24
>unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> SDNRTR < added 10.3.1.0/24
>unicast
>> >> > 2018-09-01 21:21:08.001 <TRACE> R8 < rejected by protocol
>> >10.3.1.0/24
>>
>> R8 sends a route and BIRD sends update to S.
>>
>> Everything in the log is OK, just the peers (R and S) are doing quite
>> strange things. Don't you have loops in your routing?
>>
>> Maria
>>

-- 
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