[90628] in North American Network Operators' Group
Re: Phantom packet loss is being shown when using pathping in connection with asynchronous routing - although there is no real loss.
daemon@ATHENA.MIT.EDU (Joseph S D Yao)
Wed Jun 7 16:59:00 2006
Date: Wed, 7 Jun 2006 16:57:26 -0400
From: Joseph S D Yao <jsdy@center.osis.gov>
To: Joe Abley <jabley@ca.afilias.info>
Cc: Gunther Stammwitz <gstammw@gmx.net>, nanog@merit.edu
Mail-Followup-To: Joe Abley <jabley@ca.afilias.info>,
Gunther Stammwitz <gstammw@gmx.net>, nanog@merit.edu
In-Reply-To: <67FB4828-C566-46D2-84EF-1EF211AB1D91@ca.afilias.info>
Errors-To: owner-nanog@merit.edu
On Wed, Jun 07, 2006 at 12:49:04PM -0700, Joe Abley wrote:
> On 7-Jun-2006, at 12:35, Joseph S D Yao wrote:
>
> >I can't tell you what is going on. But I can ask, (a) why are you
> >doing
> >asymmetrical routing in the first place?
>
> For any non-trivial path, it seems to me that asymmetry in forward
> and return paths is normal. Symmetrical paths are the exception.
>
> From another angle, how can anybody hope to ensure that all forward
> and return paths are identical when the only exit under their control
> is the one on the outbound path, at their own border?
>
> Joe
If this is for their customers, it wasn't clear that the path went
outside their zone of control. I did wonder.
--
Joe Yao
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