[126745] in North American Network Operators' Group
Re: Junos Asymmetric Routing
daemon@ATHENA.MIT.EDU (Jack Bates)
Fri May 28 09:18:30 2010
Date: Fri, 28 May 2010 08:15:09 -0500
From: Jack Bates <jbates@brightok.net>
To: Ken Gilmour <ken.gilmour@gmail.com>
In-Reply-To: <AANLkTiki0O-JsHjNHCrWzHMEfrsQ6uFEnPGksijZdLGC@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Ken Gilmour wrote:
> Yes I believe that would be the default if the session was initiated on the
> inside, but if it comes from outside on a particular interface which is not
> the default route, why would the router then send the packet out another
> interface? Should the device not route session-based traffic according to
> where it originated?
>
>
To my knowledge, routers don't generally route based on session. They
maintain flow information is cases, but you learn quickly that it's a
one way record, and the corresponding flows may have a different path.
There are exceptions, and perhaps some Junipers even support more
oddball session based routing, though my m120 and cisco don't seem to.
Jack
