Hikvision Cameras work on main switch, but not on remote one

[schmunkel98]

I just purchased 2 more Hikvision DS-2CD2042WD-I 4MP HD cameras to match the one I have working already. I plugged them into my main, 24 port switch downstairs and configured each of them with unique IP addresses. I am also using injectors to power these POE. I was able to see them fine on both the SADP setup tool and in Blue Iris. Then, I moved them to another remote switch upstairs that I want to permanently attach them to. They power up fine but do not communicate with either SADP or Blue Iris. I do not understand why they work when directly connected to my main switch and not from a remote switch. I am using pre-made cables for the setup and the cameras are have roughly 75 feet of total cable length when on the remote switch. Is there anything else I can try to get these to work shy of running new lines directly to the downstairs switch?

 

[dturtill]

can you connect your computer to the remote switch and try SADP to see if they show up then