Hey Steve! Hope you're enjoying your "extra" week
off! :) Have a great new year's as well!
As for the prioritization, I'm not sure I'd think that much
about it. If you look at the protocol statistics, you'll find very little
control traffic compared to the audio stream itself. Depending on your
setup, and versioning, there's a certain amount anyway... DSCP EF versus
DSCP 26 (AF31) for stream and control.
So if you are matching the ACL and DSCP EF, you're already
separating things anyway. :)
I'm just not entirely convinced that the R&S lab is
getting that specific on voice stuff, but better to ask the proctor about the
details. From a real-life standpoint, most people I know just go ahead and
prioritize both RTP and RTCP just to keep things simple. The result is
that there's "not much more" traffic sent at high priority, so you aren't really
creating problems to the rest of your QoS setup.
HTH,
Scott
Hi
Scott,
Sounds like if
I got a task requesting that I “prioritize voice traffic”, if I used the
match protocol option it would be an incorrect answer because I am missing the
RTCP traffic at that point. Right?
BTW, its steve
nowell from Cisco here – hope you have a great new years!
Thanks!
From: ccie-rs@ieoc.com [mailto:ccie-rs@ieoc.com] On Behalf
Of Scott Morris
Sent: Tuesday, December 30, 2008 6:49
PM
To: Steve Nowell (snowell)
Subject: RE: [CCIE R&S]
Match protocol rtp audio VS udp access-group
It depends on how
picky you are getting...
Technically an
audio stream is made up of a PAIR of UDP ports. One is RTP and the other
is RTCP (control). AFAIK, the "match protocol rtp audio" will only pick up
the RTP portion which is where most traffic will occur anyway.
Your ACL will pick
up both.
Do you care?
I doubt it. but that's just my opinion. Asking the proctor will
demonstrate knowledge of details, so I don't think there would be a problem with
them expressing an opinion.
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et
al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll
Free: 877-224-8987
Outside US: 775-826-4344
Online Community:
http://tinyurl.com/6dmnsu
CCIE Blog:
http://tinyurl.com/2nxxaq
Knowledge is power.
Power
corrupts.
Study hard and be Eeeeviiiil......
From:
ccie-rs@ieoc.com [mailto:ccie-rs@ieoc.com] On Behalf Of
snowell
Sent: Tuesday, December 30, 2008 5:44 PM
To:
smorris@internetworkexpert.com
Subject: [CCIE R&S] Match protocol
rtp audio VS udp access-group
Wasnt having much luck finding this anywhere, possibly someone on this forum
has the answer to this. Are the following two class-map components the
same?
match protocol rtp audio
OR
match access-group VoIP
ip access-list extended VoIP
permit udp any any range 16384 32767
Many thanks,
Steve
Internetwork Expert - The Industry Leader in CCIE
Preparation
http://www.internetworkexpert.com
Subscription information
may be found at:
http://www.ieoc.com/forums/ForumSubscriptions.aspx
Internetwork Expert - The Industry Leader in CCIE
Preparation
http://www.internetworkexpert.com
Subscription information
may be found at:
http://www.ieoc.com/forums/ForumSubscriptions.aspx
Internetwork
Expert - The Industry Leader in CCIE
Preparation
http://www.internetworkexpert.com
Subscription information
may be found
at:
http://www.ieoc.com/forums/ForumSubscriptions.aspx