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<TITLE>Re: What can you use DSCP for?</TITLE>
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<P><FONT SIZE=2>Triple play Solutions use DSCP all over the place. Lots of differenciated services, especially when subscriber management comes into play. Triple play is turning into 4 and 5xplay, then add the varying degrees of service and bundles available across the different services, and different requirements between the different data services (vodn internet, content storage, backup, sharing). Very useful tool.<BR>
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----- Original Message -----<BR>
From: owner-nanog@merit.edu <owner-nanog@merit.edu><BR>
To: John Kristoff <jtk@ultradns.net><BR>
Cc: nanog@merit.edu <nanog@merit.edu><BR>
Sent: Tue Oct 30 07:04:52 2007<BR>
Subject: What can you use DSCP for?<BR>
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On Mon, 29 Oct 2007, John Kristoff wrote:<BR>
> How much has really changed? Do you (or if someone on these big nets<BR>
> wants to own up offlist) have pointers to indicate that deployment is<BR>
> significantly different now than they were a couple years ago? Even<BR>
> better, perhaps someone can do a preso at a future meeting on their<BR>
> recent deployment experience? I did one a couple years and I haven't<BR>
> heard of things improving markedly since then, but then I am still<BR>
> recovering from having drunk from that jug of kool-aid. :-)<BR>
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Once you get past the religious debates, DSCP can be very useful to<BR>
large, complicated networks with many entry and exit points. Think<BR>
about how large networks use tools such as BGP Communities to manage<BR>
routing policies across many different types of interconnections. You<BR>
may want to consider how networks use similar tools such as DSCP to<BR>
mark packets entering networks from internal, external, source address<BR>
validated, management, etc interfaces. There are limited code-points so<BR>
you can't be too clever, but even knowing on the other side of then<BR>
network that a packet entered the network through a spoofable/non-spoofable<BR>
network interface may be very useful.<BR>
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