[81092] in North American Network Operators' Group
Re: BCP regarding TOS transparancy for internet traffic
daemon@ATHENA.MIT.EDU (Eric A. Hall)
Wed May 25 14:49:35 2005
Date: Wed, 25 May 2005 14:46:16 -0400
From: "Eric A. Hall" <ehall@ehsco.com>
To: Sam Stickland <sam_ml@spacething.org>
Cc: Mikael Abrahamsson <swmike@swm.pp.se>, nanog@nanog.org
In-Reply-To: <Pine.WNT.4.61.0505251830270.2552@tech1.office.toastedmedia.net>
Errors-To: owner-nanog@merit.edu
On 5/25/2005 1:39 PM, 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?
The markings may be used on customer networks too, even if they are not
interpreted or processed by intermediary networks (you). I mean, maybe
they are tagging different kinds of database traffic at egress and ingress
so that they can do their own congestion management. Unilaterally
rewriting all of the packets that cross your network imposes unnecessary
penalties on them and is generally rude.
It's also near blackmail--pay us or we'll overwrite your packets.
--
Eric A. Hall http://www.ehsco.com/
Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
