As always, you have different options
Case 1:
- connect IPC to POE external switch
- put IPC in DHCP mode
- uplink one of the PoE ports of NVR5216 to the POE external switch
--> your cams receive a 10.x address from the NVR
- once you have hooked a cam to a "channel", the NVR will "port forward" that channel to the outer world (eg through your LAN) --> you can then contact each cam individually on
http://ip-of-your-nvr:10081)
Case 2:
- connect IPC to POE external switch
- configure IPC to work in your "normal" LAN (eg 192.168.15.99)
- configure NVR to work in your "normal" LAN (eg 192.168.15.100)
- let NVR search for your device (eg on IP 192.168.15.99)
- add IPC to a channel
Ready!
Easy peasy
But keep in mind that bandwidth wise, connecting tons of cams through the uplink port might "congest" displaying streams through that same port.
Hope this helps,
CC