Re: voip port nubmers

Assuming the marking on packets will be correct is a sure path to
disaster (from a man who had 800 Mb/s of video marked EF hit the
switch).

What you can do on most routers is classify RTP audio traffic using NBAR.

class-map match-any VOICE
 match protocol rtp audio
!

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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On Tue, Aug 9, 2011 at 19:15, Nick Matthews <matthn_at_gmail.com> wrote:
> One other aspect to keep in mind is video, which also runs on RTP.
> Video and voice in the same priority class may get you in some
> trouble. B If you couple your class map with DSCP EF you'll be in good
> shape as most video traffic is AF41. B Alternatively, find the port
> ranges as video will usually have a different port range, vendor
> specific. B For Cisco it's 16384-32767.
>
> -nick
>
> On Tue, Aug 9, 2011 at 6:21 PM, Narbik Kocharians <narbikk_at_gmail.com> wrote:
>> Have a look at IP SLA, but the best one that i know is the pacgen (Not sure
>> about the spelling) which is a packet generator that is used in the QoS
>> classes.
>>
>> On Tue, Aug 9, 2011 at 3:12 PM, imran ali <immrccie_at_gmail.com> wrote:
>>
>>> thanks all
>>>
>>> how can i generate voip traffic ...can someone plz give me syntax for it .?
>>>
>>> i can use this for QOS testing
>>> i can also use this to enter voip flows in MTC table ( PFR )
>>>
>>>
>>>
>>>
>>> On Wed, Aug 10, 2011 at 1:09 AM, Narbik Kocharians <narbikk_at_gmail.com>wrote:
>>>
>>>> Imran,
>>>>
>>>> RTP does not have ports, these are UDP ports. The best and the most
>>>> accurate way to match on Voice traffic is to use the RTP payload type.
>>>>
>>>> On Tue, Aug 9, 2011 at 2:57 PM, Dale Shaw <dale.shaw_at_gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> On Wed, Aug 10, 2011 at 7:32 AM, imran ali <immrccie_at_gmail.com> wrote:
>>>>> >
>>>>> > is their any reserved port for VOIP traffic ? some docs says 16384 to
>>>>> > 32767.... is it going to choose any port from this range.
>>>>> >
>>>>> > does it uses UDP B or RTP B ?
>>>>>
>>>>> "VoIP traffic" could mean a lot of things, including voice
>>>>> media/payload (e.g. RTP) and/or signalling (e.g. SIP).
>>>>>
>>>>> For RTP, no, there are no 'reserved' ports. RTP is transport
>>>>> independent - it is typically carried on top of UDP/IP but it doesn't
>>>>> have to be. When carried on top of UDP/IP, RTP should use
>>>>> even-numbered ports while RTCP should use the next highest
>>>>> odd-numbered port.
>>>>>
>>>>> The port ranges used vary between vendors/applications.
>>>>>
>>>>> Cheers,
>>>>> Dale
>>>>>
>>>>>
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>>>>>
>>>>
>>>>
>>>> --
>>>> *Narbik Kocharians
>>>> *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>>>> www.MicronicsTraining.com <http://www.micronicstraining.com/>
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>>>
>>
>>
>> --
>> *Narbik Kocharians
>> *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>> www.MicronicsTraining.com <http://www.micronicstraining.com/>
>> Sr. Technical Instructor
>> YES! We take Cisco Learning Credits!
>> Training & Remote Racks available
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