[c-nsp] QoS best practices

[Alan Buxey]

Hi,
> The 3560 buffering discussion has reminded me:
> 
> It's not hard to find documentation on configuring QoS, but I haven't
> yet found any "best practices" reagarding how to specifically classify,
> i.e. what traffic goes in what queue with what DSCP/CoS marking.
> 
> For VoIP it seems there are some notes, so it seems very "best practice"
> to use EF for voice traffic and AF31 for signaling. But what about all
> other traffic?

for cisco voip there are preconfigured templates and 'autoqos' - these set
the values to pretty much what you need - even handling the subtle change
that cisco cover in QoS/VOIP courses regarding call signalling IIRC.

> What I'm looking for is something along: "Use AF23 for text based remote
> access (telnet/ssh), AF33 for GUI based remote access (remote
> X/ICA/RDP), AF99 for H.323 ..." et cetera. Also some notes on buffer
> partitioning would be nice.

:-)  well, thats down to site and link policies. This guide is pretty much our 
current 'tablet'

http://tools.ietf.org/html/rfc4594

...and this was adopted by JANET(UK) as guidelines for QoS:

http://www.ja.net/documents/development/network-engineering/qos/suggested-dscp-marking-scheme.pdf


alan