Can someone please tell me what protocols and port numbers I need to add to my Prec 5 DSCP QoS configurations to ensure that any video traffic gets pushed out first if there is congestion.
Is it just RTP and H.323 protocols?
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As you mention RTP and H.323 you are probably prioritizing videoconferencing traffic. I won't go into the details of H.323 advantages over SIP, so I''ll just go over H.323 protocols.
Also Prec 5 is really just EF (Express Forwarding). However, EF queues are very small which could lead to dropped packets. I would suggest using AF41, as you're not going to get a better advantage giving the audio portion of the videoconference a higher priority than video. Use AF41 for both audio and video.
Here are the recommended ports for the H.323 protocol.
80 Static TCP HTTP Web Interface
389 Static TCP LDAP
443 Static TCP HTTPS & Port Tunnelling
1718 Static UDP Gatekeeper Discovery
1719 Static UDP Gatekeeper RAS
1720 Static TCP H.323 Call Setup
2253 - 2263 TCP Sony endpoints
2326 - 2485 UDP Cisco/Tandberg endpoints
3230 - 3235 TCP Polycom endpoints
3230 - 3280 UDP Polycom endpoints
5001 TCP & UDP Polycom PPCIP client
5004 - 6004 TCP & UDP ClearOne endpoints
5060 TCP & UDP SIP endpoints
5061 TCP SIP TLS
5555 - 5574 TCP Cisco/Tandberg endpoints
6000-6006 TCP & UDP Librestream endpoints
8080 Static TCP HTTP Server Push (optional)
9400 - 9406 TCP & UDP AudiSoft endpoints
9800 - 9806 TCP AudiSoft Server/Gateway
9810 - 9822 UDP AudiSoft Server/Gateway
15100 Static TCP NetPoint Q.931 Call
15101 Static TCP NetPoint Default
15102 Static UDP NetPoint Default
22136 Static TCP MXM endpoint administration
Depending on the level of control you have over your network environment (or how much you trust the devices connected to it), you could also look into having the video devices themselves tag their traffic with the appropriate DSCP value, and then mapping any traffic with that value to the queue you want. I have found this to be easier than listing the protocols, since the video terminal has the best knowledge of its protocols, ports and so on. They often have a fairly consistent approach of this, tagging the media streams as AF41 (or 43 ? haven't looked this up recently). Again, this assumes you can trust the incoming tags from the LAN on your router.