From: Scott Morris (smorris@ipexpert.com)
Date: Tue May 29 2007 - 02:12:54 ART
If you are going THAT vague, should you not include things like skinny as
well? :)
There reaches a time where too much detail begins to make less and less
sense. In the actual construction of a voice call, what pieces take place?
Or more importantly, what pieces take place where applying a QoS guarantee
would truly make sense? (e.g. for tcp/1720, it would not make any sense)
Whether you define it as simply udp 16384 - 32767 or as RTP protocol in the
same range will typically depend on the environment you are applying things
in. I would likely match some other criteria as well to not accidently
cover too much (some random, rampant audio stream or gaming applicaton?)
But first look at the anatomy of a phone call. This will likely lead you to
answer your own question. To satisfy the paranoia level though, the proctor
is always around for clarification.
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Avner Izhar
Sent: Tuesday, May 29, 2007 12:50 AM
To: James Russell; ccielab@groupstudy.com
Subject: RE: QoS VoIP question
Both will probably do, but in the real lab, with that sort of general
request, I'd go to the proctor to reassure my understanding.
-------------------------------------------
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Avner Izhar
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________________________________
From: nobody@groupstudy.com on behalf of James Russell
Sent: Mon 5/28/2007 7:10 PM
To: ccielab@groupstudy.com
Subject: QoS VoIP question
Group,
Apparently, my search-fu is not working. I've been doing some labs, and it
seems like every time they mention matching voice or VoIP traffic for QoS,
they use different solutions each time. Sometimes, they just "match ip rtp
16384 16383". Others, they have an access list like:
ip access-list extended VoIP
permit tcp any any eq 1720
permit udp any <sometimes a range appears here> any range 16834 32767
The TCP port for call setup doesn't always appear, either. My question is,
how do we know what they want? If a question on the lab asks us to "match
all voice traffic", what path do we take? Do we match ip rtp 16384 16383?
Match like the access list shown? Match protocol rtp audio?
I apologize if this has been answered before. Like I said, I can't seem to
search too well tonight.
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