BCP regarding TOS transparancy for internet traffic

Wed May 25 15:59:51 UTC 2005

On (2005-05-25 11:49 -0400), Valdis.Kletnieks at vt.edu wrote:

> Out of curiosity, what did you hope to accomplish by zeroing that field?

 IMHO only reason not to zero TOS byte on AS ingress border is that you
explicitly agreed with your neighbour how it is used (what traffic it 
can contain, what is the absolute limit they will send that traffic in,
etc.)
 I personally don't want to see DoS traffic taking eg. VoIP priority.

 I've been also thinking about possibility to differentiate in MPLS EX/TOS
AS internal and AS external traffic and under congestion start to drop
AS external traffic first.

> (If you're planning to zero it on ingress to your network, use it for your
> own nefairious traffic-engineering purposes, and then re-zero on egress,
> *and* your contracts with your customers say it's OK to do it, then it might
> be defensible.  Maybe. ;)

-- 
  ++ytti