[83869] in North American Network Operators' Group

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Re: Order of ASes in the BGP Path

daemon@ATHENA.MIT.EDU (Tom Sanders)
Mon Aug 29 20:58:00 2005

Date: Tue, 30 Aug 2005 06:26:06 +0530
From: Tom Sanders <toms.sanders@gmail.com>
To: Robert Bonomi <bonomi@mail.r-bonomi.com>
Cc: nanog@nanog.org
In-Reply-To: <200508291747.j7THlIVf001838@host122.r-bonomi.com>
Errors-To: owner-nanog@merit.edu


> >
> > Legend: {} denotes the sequence, while [] denotes the set
> >
> > Path {1 2} [3 4] {5}
>=20
> As I understand the specs, that is -not- allowed.  an unordered set
> can appear only as the _last_ element of the AS path list.

Yes, I understand that right now it is not possible to receieve or
generate such a Path, but i dont recollect the BGP draft precluding
this. Correct me if i am mistaken here.

Toms.

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