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RE: Matching Voice Signalling traffic posted 11/09/2004
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Interesting case....

As a note though, "cRTP" is compressed RTP.  RTCP is the Real Time Control
Protocol.  The latter is what you mean to talk about.  ;)

 
Scott Morris, MCSE, CCDP, CCIE4 (R&S/ISP-Dial/Security/Service Provider)
#4713, JNCIP, CCNA-WAN Switching, CCSP, Cable Communications Specialist, IP
Telephony Support Specialist, IP Telephony Design Specialist, CISSP
CCSI #21903
swm@xxxxxxxxxx
 
 
 

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of Sasa
Milic
Sent: Tuesday, November 09, 2004 5:52 AM
To: ccie2be
Cc: Kelly, Russell G; David Duncon; ccielab@xxxxxxxxxxxxxx
Subject: Re: Matching Voice Signalling traffic

Tim,

you can match IP Prec 5 for RTP/cRTP packets, and match IP Prec 3 for
signaling packets. But, don't put them into same class ! Usually, you need
"priority" class for RTP/cRTP and "bandwidth" class for signaling. Since
priority class also modify queue depth and does policing it can have
negative impact on signaling. I have TAC case regarding this (signaling
stops working if it is part of priority class, when fragment size is less
than 580 bytes ...).

Regards,
  Sasa


ccie2be wrote:
> 
> Hi guys,
> 
> Where does this fit in?  Can this also be used to match voip traffic 
> and signalling?
> 
> class-map VOIP
>     match protocol rtp
> 
> If matching rtp can't be used for matching voip traffic & signalling, 
> when would someone use match prot rtp?
> 
> Thanks, Tim
> 
> ----- Original Message -----
> From: "Kelly, Russell G" <Russell_Kelly@xxxxxxxxxx>
> To: "David Duncon" <david_ccie@xxxxxxxxxxx>; <ccielab@xxxxxxxxxxxxxx>
> Sent: Thursday, September 30, 2004 11:44 AM
> Subject: RE: Matching Voice Signalling traffic
> 
> > Btw, by match do you mean QoS values?  The QoS match dscp values 
> > change with every revision of Callmanager, but here are some match 
> > QoS statement examples for a DSL user:
> >
> > class-map match-all signalling
> >   description Match Voice Signalling Traffic
> >   match ip dscp af31
> > class-map match-all voice
> >   description Match Voice Bearer Traffic
> >   match ip dscp ef
> > !
> > !
> > policy-map voice
> >   class voice
> >    priority 150
> >   class signalling
> >    bandwidth 8
> >   class class-default
> >    bandwidth 16
> >    random-detect
> > !
> >
> > Cheers
> > Russ
> >
> >
> >
> > -----Original Message-----
> > From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf 
> > Of David Duncon
> > Sent: 30 September 2004 14:02
> > To: ccielab@xxxxxxxxxxxxxx
> > Subject: Matching Voice Signalling traffic
> >
> >
> > Hello Group,
> >
> > I am little unsure on the best way to *match* the Signaling traffic.
> >
> > In the recent past I have a seen a config where the author has used 
> > to match the destination port greater than TCP 3000 , equal to TCP 
> > 2000 & 2748.
> > And
> > also equal to TCP 1720.
> >
> > Can some please explain why these ports are necessary to match 
> > signaling
> >
> > traffic. I was impression that signaling only uses TCP 1720 :(
> >
> > And also like RTP using the *even* ports from 16384 to 32768 , I was 
> > impression that Signaling uses *odd* ports in the same range ??
> >
> > I appreciate any clarification on the above queries :-)
> >
> > Thanks in advance
> >
> > David.
> >
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