IPv6 prefix is not stored to kernel when multipath is enabled in 1.6.8

[Jimmy Lim]

I thought the issue might be related to configuration instead of bird
version 😕

Let me try to use another box that run bird 2 for testing as well.

Cheers guys,
Jimmy

On Fri, Feb 14, 2025, 12:36 AM Alexander Zubkov <green at qrator.net> wrote:

> And I think there will be no more updates:
>
> https://bird.network.cz/?o_news
> 25.4.2023 BIRD 1 end of life will happen at the end of 2023. Please finish
> you upgrade to BIRD 2 ASAP!
>
> On Thu, Feb 13, 2025 at 5:01 PM Douglas Fischer <fischerdouglas at gmail.com>
> wrote:
>
>> uuuhhh... 1.6?
>>
>> This version has not been receiving updates for quite some time.
>> Definitely more than 5 years ago. And even before that, for a few years
>> version 1.6 was only receiving fixes.
>>
>> I suggest you consider migrating to the current version of Bird2, which
>> if I'm not mistaken is 2.16.1
>>
>> Em qui., 13 de fev. de 2025 às 00:08, Jimmy Lim <jhalim10 at gmail.com>
>> escreveu:
>>
>>> Hi guys,
>>>
>>> I have multipath enabled on bird6 running in old 1.6.8. I discovered
>>> that the IPv6 prefix failed to be installed properly in the kernel with
>>> more than 1 path and when multipath is enabled.
>>>
>>> syslog message:
>>>
>>>> Feb  9 23:54:31 x40-n bird6: kernel1 < replaced fcdf::/16 multipath
>>>> Feb  9 23:54:53 x40-n bird6: kernel1: fcdf::/16: reinstalling
>>>> Feb  9 23:55:53 x40-n bird6: kernel1: fcdf::/16: reinstalling
>>>> Feb  9 23:56:53 x40-n bird6: kernel1: fcdf::/16: reinstalling
>>>
>>>
>>> The IPv6 prefix is installed properly if I remove multipath in bird6:
>>>
>>>> #    merge paths on;
>>>
>>>
>>> But then it means the path won't be shared with the rest of the path.
>>>
>>> syslog message:
>>>
>>>> Feb  9 23:57:15 x40-n bird6: kernel1 < added fcdf::/16 dev wg2
>>>> Feb  9 23:57:15 x40-n bird6: kernel1: fcdf::/16: reinstalling
>>>> Feb  9 23:58:15 x40-n bird6: kernel1: fcdf::/16: seen
>>>> Feb  9 23:59:16 x40-n bird6: kernel1: fcdf::/16: seen
>>>
>>>
>>> Do you guys encounter this issue or is there any other configuration
>>> needed? The multipath works well in IPv4/bird.
>>>
>>> Thanks,
>>> Jimmy
>>>
>>
>>
>> --
>> Douglas Fernando Fischer
>> Engº de Controle e Automação
>>
>
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