QoS/CoS in the real world?

Thu Jul 25 21:31:51 UTC 2002

Kurtis,

My apologies on the low SNR.  The original question(s) centered around
the customer requirements/applications/experience and I thought the
product guys could speak to it better than I ... and certainly and
without giving away any of our "patent pending processes".  :)

I think "native" can be translated as to mean "non-ATM".  All core links
are PPP/POS.

MPLS does not imply or require DSCP, or vice versa.  DSCP/EXP promotion
ensures priority packets to be forwarded ahead of best effort at each
hop thru the network.  Could this be done other ways? Sure.  The
original question was how was/is this being done for customer traffic -
this is how we do it in the core...along with queueing gymnastics. 

As for MPLS features, I think fast re-route qualifies.  MPLS also
provides traffic eng capabilities, as well as in-order packet delivery,
which we've found to be useful for customer voice 'n video traffic.

J

-----Original Message-----
From: Kurt Erik Lindqvist [mailto:kurtis at kurtis.pp.se] 
Sent: Thursday, July 25, 2002 5:54 AM
To: nanog at merit.edu
Subject: RE: QoS/CoS in the real world?

Appart from that this to me looks like a marketing post....

> Sorry I didn't see this note earlier, but wanted to make you aware 
> that Masergy Communications is actually offering such a service on a 
> native MPLS based IP network.  We provide differentiated IP services 
> via

"native MPLS based IP network" ? Native to what?

> MPLS based IP network.  We provide differentiated IP services via 
> customer DSCP marking at the network edge. QoS is supported end to end

> through the Masergy core via promotion to the MPLS EXP marking.

Uhm, I never figured out why we need MPLS to honor the DSCP markings.
After 
reading further in the text it doesn't seem to me as if you are using
any 
of the MPLS "features" either...

Sorry - I couldn't resist...

- kurtis -