From: Songbin Wei (sbwei_2000@yahoo.com)
Date: Fri Apr 11 2003 - 15:33:01 GMT-3
Basically, voip uses udp port range 16384-32767. So
the following config is correct:
EX 1
> access-list 100 permit udp any any range 16384 32767
The config:
ip rtp priority 16384 16383 40
is also correct for 18383 is the increment, not range.
--- Niksa Tomulic <ccie@otokrab.net> wrote:
> Hi,
> Reading trough QOS for VoIP, and using ACLs to
> identify VoIP traffic, I
> can't find definite reference about which ports VoIP
> traffic use.
> There are different examples by Cisco what I've seen
> so far:
>
> For sure there is TCP port 1720 which is used for
> H.323 signaling
> traffic, but: for VoIP itself I've seen different
> examples, and they all
> state "common UDP ports used by VoIP":
>
> EX 1
> access-list 100 permit udp any any range 16384 32767
>
> EX 2
> access-list 100 permit udp any any range 16384 32000
>
> And with this command, again different:
>
> ip rtp priority 16384 16383 40
>
> Any thoughts?
>
> Thanks,
> niksa
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