handling of the onlink next hop

Maria Matejka maria.matejka at nic.cz
Wed May 28 15:04:29 CEST 2025


Hello Radu, 

> bird[3287848]: filters, line 8: Argument 1 of RTA_SET must be of type ip,
> 
> when running with the following configuration, which works perfectly on 
> bird-2.16.2
>
> ```
>  1
>  2 router id from "-tun*", "*";
>  3
>  4 filter from_kubernetes {
>  5  if ( net ~ 10.250.1.0/24 || net ~ 10.110.1.0/24  ) then {
>  6    ifname = "tunl0";
>  7    onlink = true;
>  8    gw = from;
>  9    accept;
> 10  }
> 11  reject;
> 12 }
> .....
> ```

Which protocol originates the routes which are filtered by
`from_kubernetes`? It looks like the `from` attribute is not set
(which is probably another bug).

Thanks,  
Maria

-- 
Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
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