Thank you, it works with last_nonaggregated, I don't know how I didn't
notice that in the doc.

Radu

On 11.04.2018 20:06, Matthias Waehlisch wrote:
> Hi Radu,
> 
>   the path includes an AS-set ({30884 65004 65005}).
> 
> "Both first and last return zero if there is no appropriate ASN, for 
> example if the path contains an AS set element as the first (or the 
> last) part. If the path ends with an AS set, last_nonaggregated may be 
> used to get last ASN before any AS set. "
> 
>   AS-sets are deprecated: https://tools.ietf.org/html/rfc6472
> 
>   Strictly speaking, you you don't know which AS in AS-set is the actual 
> origin.
> 
> 
> 
> Cheers
>   matthias
> 
> 
> On Wed, 11 Apr 2018, Radu Anghel wrote:
> 
>> Hello,
>>
>> I have found this while doing RPKI validation:
>>
>> net = 94.127.104.0/21
>> bgp_path = 48112 6830 174 13110 {30884 65004 65005}
>> BGP.aggregator: 10.253.27.1 AS13110 (don't know how to read this from a var)
>>
>> roa_check(rpki4, net, bgp_path.last) returns ROA_INVALID because BIRD
>> thinks bgp_path.last = 0
>>
>> There is a valid ROA for 94.127.104.0/21 and AS13110, so I guess the
>> validation should be done on the aggregator AS.
>>
>> Could you tell me what is the corect way to handle this?
>>
>> TIA,
>> Radu
>>
> 
> 

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