AS path weirdness

Christian Koch christian at
Sun Mar 22 17:19:45 UTC 2009

a private asn in (parentheses) indicates a bgp confederation, i would
tend to think that there is some sort of mis-config or software bug in
one of the routers in that path thats leaking it

On Sun, Mar 22, 2009 at 7:51 AM, Jason Lewis <jlewis at> wrote:
> I was under the impression that MRT only used brackets for sets.  eg.
> Thanks for taking a look.
> jas
> James Aldridge wrote:
>> Jason Lewis wrote:
>>> I'm not entirely sure what I'm looking at. The reserved AS, 65490
>>> appears in parentheses and I've never seen that in MRT formatted data
>>> and not sure why it's happening.
>> That would be a single-element AS_SET, I guess.

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