Wrong BGP NH metric

[Maria Matejka]

Hello!

I'd suspect the internal nexthop resolving mechanisms of missing the 
OSPF route update. When working on the multithreaded version, I came 
across a similar kind of bug and I honestly don't know yet how exactly 
this may be broken.

That said, is it possible that the metric is just an obsolete value from 
some previous route version?

Thanks for your report.

Maria

On 9/30/22 17:10, Mihai via Bird-users wrote:
> Hello,
> 
> The same issue on another RR, the BGP_Metric=60380 while the 
> OSPF_Metric=60315.
> 
> bird> sh route 10:10 202.81.16.0/24 all
> Table vpntab4:
> 10:10 202.81.16.0/24 unicast [ROUTER2 2022-09-29 15:21:18 from 
> 10.100.186.6] * (100/60380) [AS4826i]
>          Type: BGP univ
>          BGP.origin: IGP
>          BGP.as_path: 4826
>          BGP.next_hop: 10.100.186.6
> 
> bird> show route 10.100.186.6/32
> Table master4:
> 10.100.186.6/32      unicast [OSPF 2022-09-30 15:01:51] IA (150/60315) 
> [10.100.186.4]
> 
> 
> 
> On 30/09/2022 09:08, Mihai wrote:
>> Hello,
>>
>> First I would like to thank you for this amazing software!
>>
>> I am running Bird 2.0.7 as RR for L3VPNs and on one RR the OSPF metric 
>> for the BGP NH is different than what's seen in BGP as shown below.
>>
>> BGP PREF/METRIC = (100/61580) , OSPF_METRIC = 61480.
>>
>>
>> bird> sh route 10:10 94.207.96.0/19 all primary
>> Table vpntab4:
>> 10:10 94.207.96.0/19 unicast [ROUTER1 2022-09-28 00:10:09 from 
>> 10.100.186.1] * (100/61580) [AS15802i]
>>          Type: BGP univ
>>          BGP.origin: IGP
>>          BGP.as_path: 15802
>>          BGP.next_hop: 10.100.184.8
>>
>> bird> sh route 10.100.184.8/32
>> Table master4:
>> 10.100.184.8/32      unicast [OSPF 2022-09-29 12:33:35] IA (150/61480) 
>> [10.100.186.5]
>>
>> After restarting the BIRD OSPF adjancency the BGP metric changed to 
>> 61480.
>>
>>
>> Any help in understanding the issue would be much appreciated.
>>
>> Thank you!
> 
> 
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