Wrong BGP NH metric

Mihai mihaigabriel at gmail.com
Fri Sep 30 17:10:17 CEST 2022


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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