[90626] 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 (Joe Abley)
Wed Jun 7 15:49:40 2006
In-Reply-To: <20060607193509.GA21493@core.center.osis.gov>
Cc: Gunther Stammwitz <gstammw@gmx.net>, nanog@merit.edu
From: Joe Abley <jabley@ca.afilias.info>
Date: Wed, 7 Jun 2006 12:49:04 -0700
To: Joseph S D Yao <jsdy@center.osis.gov>
Errors-To: owner-nanog@merit.edu
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
