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RE: VoIP QOS best practices
From: "Ray Burkholder" <ray () oneunified net>
Date: Mon, 10 Feb 2003 13:33:28 -0500


There are two aspects to QoS that you have direct control over: 1)
traffic leaving your network (easy to QoS since you (most of the time)
have access to the egress equipment) and 2) traffic arriving on your
end-point which is harder to do, but more and more service providers are
assisting with QoS on that final ingress link to your network to ensure
timely delivery of voice vs your regular traffic.

Ray Burkholder


-----Original Message-----
From: Bill Woodcock [mailto:woody () pch net] 
Sent: February 10, 2003 13:58
To: Stephen J. Wilcox
Cc: nanog () nanog org
Subject: Re: VoIP QOS best practices



    > However, its important that the backbone is operating 
"properly" ie not
    > saturated which I think should be the case for all 
network operators, theres a
    > requirement tho if the customer has a relatively low 
bandwidth tail to the
    > network which is shared for different applications, its 
probably a good idea to
    > make sure the voip packets have higher priority than 
non-realtime data... (this
    > last comment is a suggestion, I've not actually tested 
this in a real
    > environment, low b/w lab tests tend to exclude other 
traffic flows)

We've got plenty of the INOC-DBA phones on the ends of 
congested satellite
tail-circuits, and don't really have significant trouble.  As has been
pointed out, the VoIP traffic may be stomping all over TCP 
traffic on the
same links, but it _sounds_ good.  :-)

                                -Bill





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