On Sep 22, 2010, at 9:47 AM, Marshall Eubanks wrote:
> On Sep 22, 2010, at 9:25 AM, Heath Jones wrote:
>
>> Hi all,
>>
>> Probably a silly question, but can anyone explain to me this: 3561
>> 3356 9031 {35821,35821,35821,35821} i
>
> Isn't this just AS prepending ?
If so, it's broken prepending. RFC 4271, 9.1.2.2:
a) Remove from consideration all routes that are not tied for
having the smallest number of AS numbers present in their
AS_PATH attributes. Note that when counting this number, an
AS_SET counts as 1, no matter how many ASes are in the set.
Generating an AS_SET like the one depicted seems to be pointless, albeit
harmless as well.
--John
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