[81089] in North American Network Operators' Group
Re: BCP regarding TOS transparancy for internet traffic
daemon@ATHENA.MIT.EDU (Fred Baker)
Wed May 25 14:22:18 2005
In-Reply-To: <Pine.WNT.4.61.0505251830270.2552@tech1.office.toastedmedia.net>
Cc: "Eric A. Hall" <ehall@ehsco.com>,
Mikael Abrahamsson <swmike@swm.pp.se>, nanog@nanog.org
From: Fred Baker <fred@cisco.com>
Date: Wed, 25 May 2005 11:18:42 -0700
To: Sam Stickland <sam_ml@spacething.org>
Errors-To: owner-nanog@merit.edu
On May 25, 2005, at 10:39 AM, Sam Stickland wrote:
> While it's true that IP is end-to-end, are fields such as TOS and DSCP
> meant to be end to end? A case could be argued that they are used by
> the actual forwarding devices on route in order to make QoS or even
> routing decisions, and that the end devices shouldn't actually rely on
> the values of these fields?
It used to be that TCP would reset a session if the TOS byte changed in
mid-session. That certainly sounds like an end-to-end expectation.
