match ip rtp 16383 16383 or match ip rtp 16384 16383
Can someone tell me the difference between these two commands. We have routers with QoS configurations done both ways. I know that the "match ip rtp 16384 16383" matches all even RTP ports, which are used for payload and does not match RTP odd ports, which are used signaling. But what is the result if you use "match ip rtp 16383 16383"? This command is also found in some old Cisco documentation but I can't find what exactly it's matching.
The solution could have referred to IP ACL 101 with the match ip access-group 101 command, with ACL 101 matching UDP ports between 16,384 and 32,767, inclusive, to match all VoIP traffic. However, the match ip rtp command matches only the even-numbered ports in this same UDP port range. (VoIP payload only uses the even port numbers.) Therefore, the match ip rtp command is more efficient for matching VoIP, easier to configure, and only matches the VoIP payload.
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