Direct protocol affects BGP

[Alexander Zubkov]

I think it would be easier if you showed your route tables in both cases.

On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti <irene.lalioti at restena.lu> wrote:
>
> Hello guys!
>
> Just because today we encountered again the same issue with direct, I am very curious on this:
>
> I totally agree with what you guys explained about the need of the direct protocol. Once we set it then reachability works and all is ok.
>
> Our big question is why was it working before the moment it lost the BGP session?? In other words: the set up :
>
> RS - BGP session with the ROUTER - and behind the Router we have Caches.
>
> Before the router was announcing to the RS(BIRD v2.0.7) the caches and that they are reachable by the router. Without any direct.
>
> Until one day we lose the bgp session, and we can ping the caches from the RS but not reachable . Once we set it as direct on the bird then all is fine.
>
> Question is why was it working before without direct ?? :=)
>
> Many thanks for your time!
>
> Have a great day all!
>
> Irene.
>
> On 23/03/2020 17:07, Fabiano D'Agostino wrote:
>
> Hi Bernd,
> no, the routing "from the kernel" doesn't come via 'learn yes', but via RIB, I mean if I do 'route' it shows the directly connected networks. The problem is that if I use the Direct protocol, the command 'route' shows me two same directly connected networks, one coming from RIB and the other one coming from Bird.
> I tried protocol bgp { direct; }, but it doesn't change.
>
> Thanks,
>
> Fabiano
>
> Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann <bena at spreadshirt.net> ha scritto:
>>
>> On 23.03.20 16:01, Fabiano D'Agostino wrote:
>> > Hi Benedikt,
>> > I am just learning Bird and I didn't want to use the Direct protocol
>> > because using it I have two same routes in the RIB for the directly
>> > connected networks, one coming from the kernel and the second one coming
>> > from the direct protocol.
>>
>>
>> Is the routing "from the kernel" coming via `learn yes;`? If you have no
>> need to import "alien" routes, you can disable `learn` and just use
>> `direct` and `static` protocol. /* OR if you know that your neighbor is
>> directly connected to you can also set 'direct' on the `protocol bgp`. */
>>
>> Bernd
>>
>>
>
> --
> Irene Lalioti
> Network Engineer
> Fondation RESTENA
> 2, avenue de l'Université
> L-4365 Esch/Alzette
>
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