David, why do you want to change the ports of the camera?
I don't see why network traffic would be impacted at all.
"Current experience seems to point that it doesn't matter."
Yes, that's my experience as well. There might be some edge cases where it might make sense but typically leave as is. Indeed, changing ports could create integration issues as 3rd party systems typically default to the default ports of cameras.
IPVMU Certified | 09/02/14 09:05pm
I was just trying to solidify my understanding. A decent amount of my knowledge has been gained hands on versus training. So when I first started working with ports in a network I made an assumption that using the same port would cause a conflict. I think I understand it better now and when a request is made it uses both the IP and Port number to locate its destination. For whatever reason I had thought that the ports available were just the single range of 1-65535 non specific to the IP address.
Thanks for clarifying.
If they're all on the same LAN and you're not trying to access them remotely (from the Internet), then it doesn't matter.
If you're going to want remote access via the Internet, then you're typically going to have to remap the ports on the cameras to something unique, so that you can configure port-forwarding on the router.
Packets on the network are addressed to the *MAC* address of the camera at the lowest level. The IP address and port of the camera are higher up the stack, and it doesn't matter if 10 different cameras use the same port # for RTSP, that data is basically transparent in regards to the LAN.