[77681] in North American Network Operators' Group
Re: Rapidly-variable routing on the time scale of seconds to minutes?
daemon@ATHENA.MIT.EDU (Daniel Roesen)
Tue Feb 1 02:01:31 2005
Date: Tue, 1 Feb 2005 08:01:00 +0100
From: Daniel Roesen <dr@cluenet.de>
To: 'John Fraizer' <nanog@enterzone.net>, nanog@merit.edu
Mail-Followup-To: 'John Fraizer' <nanog@enterzone.net>,
nanog@merit.edu
In-Reply-To: <20050201030839.GA63085@scylla.towardex.com>
Errors-To: owner-nanog-outgoing@merit.edu
On Mon, Jan 31, 2005 at 10:08:39PM -0500, James wrote:
> AFAIK, multiple routers showing up in a single-hop in traceroute response is
> a sign of packet-by-packet load balancing, not flow based.
Not necessarily, and in most cases probably not a fact. Don't forget
that standard UNIX traceroute uses UDP where the destination port of
the probes is increased for each subsequent probe. So per-flow
balancing hashes taking L4 header information into account will see
each traceroute probe as distinct "flow".
Best regards,
Daniel
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