Multi protocol route handling (IPv4 via IPv6)

[Nico Schottelius]

Hey Ondrej,

very nice and also nice short patch!

Do you plan to create a new release soon? Otherise I'll give it a try
from git directly.

Best regards,

Nico

Ondrej Zajicek <santiago at crfreenet.org> writes:

> On Sat, Nov 09, 2019 at 07:58:43PM +0100, Nico Schottelius wrote:
>>
>> Hello,
>>
>> I have setup an MP-BGP with 2 bird instances and my aim is to route IPv4
>> via IPv6, like cumulus is doing it.
>>
>> Currently I receive the IPv4 and IPv6 routes via the IPv6 session, as
>> follows:
>>
>> 58.69.253.0/24       unicast [router2_place5_ungleich_ch_v6 18:11:21.625] ! (100) [AS36776i]
>>         via 2a0a:e5c0:1:8::4 on bond0.8
>> 23.211.0.0/22        unicast [router2_place5_ungleich_ch_v6 18:11:21.625] ! (100) [AS16625i]
>>         via 2a0a:e5c0:1:8::4 on bond0.8
>> ...
>> Now my question regarding bird:
>>
>> If the kernel / i route actually supports it (as seen in the 2nd
>> system), should bird2 be able to install the IPv4 routes via IPv6 or
>> not?
>
> Hello
>
> Fixed in git:
>
> https://gitlab.labs.nic.cz/labs/bird/commit/53401bef63013dfee01b65d071ffbd88e457539f
>
>
> Now works even with ECMP:
>
> # ip r l
> 10.0.10.0/24 proto bird metric 32
>     nexthop via inet6 2001:1488:fffe:6::1 dev eth0 weight 1
>     nexthop via inet6 2001:1488:fffe:6::2 dev eth0 weight 1


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