Ok so in the end is there a way to install more then one route in the kernel
table through bgpd or not ?
And if it's something that could be done in the future ?
Cheers
Marco
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-----Original Message-----
From: Stuart Henderson <stu.li...@spacehopper.org>
Sent: Wednesday, May 15, 2024 8:26 AM
To: misc@openbsd.org
Subject: Re: Bgpd multipath conf
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On 2024-05-14, Marco Agostani <marco_agost...@solarturbines.com> wrote:
> I try to setup an openbgpd setup involving multipath configuration
> ...with = no success.
...
> neighbor $GW01 {
> descr "bgp#1"
> announce IPv4 unicast
> announce add-path recv yes
> set localpref 110
> }
This just announces the add-path BGP capability.
> #bgpctl sh rib
> https://urldefense.com/v3/__http://172.18.180.0/24__;!!FtR4BK4x7WL3xYs
> !6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG2
> 7Pi4GFOtJXl9T8K7jGv49b5Fz40$
>
> flags: * =3D Valid, > =3D Selected, I =3D via IBGP, A =3D Announced,
> S =3D Stale, E =3D Error
> origin validation state: N =3D not-found, V =3D valid, ! =3D invalid
> aspa validation state: ? =3D unknown, V =3D valid, ! =3D invalid
> origin: i =3D IGP, e =3D EGP, ? =3D Incomplete
>
> flags vs destination gateway lpref med aspath origin
> *> N-?
> https://urldefense.com/v3/__http://172.18.180.0/24__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv49b5Fz40$
>
> https://urldefense.com/v3/__http://10.0.1.241__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv41J-7V7w$
> 110 0 14381 i
> *m N-?
> https://urldefense.com/v3/__http://172.18.180.0/24__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv49b5Fz40$
>
> https://urldefense.com/v3/__http://10.0.1.245__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv48_2TUKx$
> 110 0 14381 i
>
> Show me two routes one marked with multipath
>
> But in fib I see only one route
>
> #bgpctl sh fib
> https://urldefense.com/v3/__http://172.18.180.0/24__;!!FtR4BK4x7WL3xYs
> !6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG2
> 7Pi4GFOtJXl9T8K7jGv49b5Fz40$
>
> flags: B =3D BGP, C =3D Connected, S =3D Static
> N =3D BGP Nexthop reachable via this route
> r =3D reject route, b =3D blackhole route
> flags prio destination gateway
> B 48
> https://urldefense.com/v3/__http://172.18.180.0/24__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv49b5Fz40$
>
> https://urldefense.com/v3/__http://10.0.1.241__;!!FtR4BK4x7WL3xYs!6DAqIASIWdakyXeDyLwAsmIOK4cM3WJigBhTBEZwFP2QSx-N8iqQRQKGfW0L4XpCyVGG27Pi4GFOtJXl9T8K7jGv41J-7V7w$
...
> What I miss here ??
bgpd does allow add-path and having multiple paths to a prefix in the RIB (e.g.
perhaps useful on a route-server) but it does not handle adding multiple paths
for the same prefix to the FIB.
