From: Scott Morris (swm@emanon.com)
Date: Fri Aug 13 2004 - 10:01:02 GMT-3
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According to RFC 3550, all participants in an H.323 conversation (which is
your two endpoints, being IP phones or routers with FXS ports) MUST send
RTCP. Therefore, H.323 voice ALWAYS works in pairs of ports (which is good
to know that I am not going insane, at least not for this part!)
:)
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIP, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net <http://www.ipexpert.net/>
_____
From: Richard Dumoulin [mailto:richard.dumoulin@vanco.es]
Sent: Friday, August 13, 2004 6:06 AM
To: Carlos G Mendioroz; Scott Morris
Cc: 'lab'
Subject: RE: qos for voice
There's no RTCP between the ephones and CME but there is between the Voice
gateways I think, no ?
--Richard
-----Original Message-----
From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
Sent: viernes, 13 de agosto de 2004 11:35
To: Scott Morris
Cc: 'Steven A Ridder'; 'John Matus'; 'lab'
Subject: Re: qos for voice
Scott Morris wrote:
> Actually, voice streams use a pair of ports (even and odd) for RTP and
> RTCP stuff (voice data and control).
This depends on what the endpoints are.
Although true for CCM, this does not hold, e.g., for CME to Voip phone
AFAIK. No RTCP there.
>
> The rtp priority command with "16384 16383" numbers isn't a range. In
> that command, it's the starting port and number of ports
> (16384+16383=32767) whereas the other command actually is a range with
> start and stop information.
>
> HTH,
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Steven A Ridder
> Sent: Thursday, August 12, 2004 8:57 PM
> To: 'John Matus'; swm@emanon.com; 'lab'
> Subject: RE: qos for voice
>
> The difference between the 1st and 2nd statement is as follows:
>
> The first statement (the udp 16384...) matched the payload and
> signal/control traffic where the "IP RTP" statement captures the data
> packets only. The first statement ensures that ALL RTP traffic
> (payload and
> signal) packets get matched. If I remember correctly, each RTP stream
uses
> 4 consecutive ports, starting with the first even port above 16384, so the
> first stream uses 16384-16387. It's been a while, but I think that's
> correct.
>
> Steve Ridder
>
>
> -- RFC 1049 Compliant
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of John Matus
> Sent: Thursday, August 12, 2004 8:08 PM
> To: swm@emanon.com; 'lab'
> Subject: Re: qos for voice
>
> i have no idea if it is working........it's a lab scenario
>
> i wasn't sure if the 'match rtp' somehow included the tcp 1720. i
really
> don't understand the difference between the two statements or why or
> why not they would be used. any insite you could give would be most
> helpful!
>
>
> ----- Original Message -----
> From: "Scott Morris" <swm@emanon.com>
> To: "'John Matus'" <jmatus@pacbell.net>; "'lab'"
> <ccielab@groupstudy.com>
> Sent: Thursday, August 12, 2004 4:36 PM
> Subject: RE: qos for voice
>
>
>
>>Well, off the cuff, it would appear that you aren't matching the H225
>>call setup (tcp/1720) in your second class. Otherwise, you are either
>>matching on the RTP header or the UDP header information.
>>
>>Do they both work for you? ;)
>>
>>
>>Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
>>CISSP, JNCIP, et al. IPExpert CCIE Program Manager
>>IPExpert Sr. Technical Instructor
>>swm@emanon.com/smorris@ipexpert.net
>>http://www.ipexpert.net
>>
>>
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>>Of
>
> John
>
>>Matus
>>Sent: Thursday, August 12, 2004 6:29 PM
>>To: lab
>>Subject: qos for voice
>>
>>is there a difference between the following??
>>
>>class-map match-all voip
>>match access-group 101
>>
>>access-list 101 permit tcp any any 1720
>>access-list 101 permit udp any any range 16384 32787
>>
>>AND
>>
>>class-map match-all voip
>>match ip rtp 16384 16383
>>
>>
>>do they perform the same function or are they completely different.
>>i'm confused :)
>>
>>
>>
>>John D. Matus
>>MCSE, CCNP
>>Office: 818-782-2061
>>Cell: 818-430-8372
>>jmatus@pacbell.net
>>
>>______________________________________________________________________
>>_
>>Please help support GroupStudy by purchasing your study materials from:
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>>
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>
>
> ______________________________________________________________________
> _
> Please help support GroupStudy by purchasing your study materials from:
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>
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> ______________________________________________________________________
> _
> Please help support GroupStudy by purchasing your study materials from:
> http://shop.groupstudy.com
>
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
> ______________________________________________________________________
> _
> Please help support GroupStudy by purchasing your study materials from:
> http://shop.groupstudy.com
>
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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