From: Scott Morris (swm@emanon.com)
Date: Fri Feb 14 2003 - 15:57:32 GMT-3
While you COULD do this, voice is typically looked at to be treated as
dscp EF (46), which equates to IP prec 5, low delay, high reliability
when you look at the bits as legacy RFC791 would interpret them.
If you have diff-serv capable devices all through your network and
create a QoS policy across all of them to make some sense out of things,
then there's no saying you can't do 63 though! There are just presumed
values (EF, Afxx) for drop thresholds and whatnot along the way.
Also, signaling is typically treated with lower priority, your call
setup is TCP anyway.
HTH,
Scott
PS. I wasn't aware that the "ip prec" command went away on dial peers.
:)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Sage Vadi
Sent: Friday, February 14, 2003 1:15 PM
To: ccielab@groupstudy.com
Subject: QOS: VoIP (IP-Prec)
All,
Q) Config all outgoing voice traffic with IP Prec set
to Critical (5). All other traffic should have it's
prec set to 0.
A) It seems to me there are 2 ways I can do this:
1# (12.2.13T - it didn't have ip prec command under
dial-peer, so I choose closest DSCP mapping):
dial-peer voice 3 voip
ip qos dscp 63 media
ip qos dscp 63 signaling
2#
Wrute an ACL for UPD streams 16384-32767 and set a
route-map with ip prec critical.
Everyone agree?
FXS/FXO voice obviously...
Cheers,
Sage
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