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If you're inclined to experiment - you can access PoE-connected cameras directly on a Hikvision NVR.
3 things required :
Enable 'Virtual Host' - the tick box under web GUI Network | Advanced Settings | Other. This implicitly activates the Linux kernel 'IP_forward' (not to be confused with port forwarding) facility to route traffic between the NVR PoE and LAN interfaces.
Ensure that the default gateway setting on the PoE-connected cameras is the NVR PoE interface IP address, usually 192.168.254.1
Create a 'static route' on your LAN gateway/router to inform LAN devices how to reach the NVR PoE network segment.
Something like 'For network 192.168.254.0, subnet mask 255.255.255.0, use <NVR_LAN_interface_IP_address> as the gateway'.
Then the PoE-connected cameras can be accessed from the LAN via their native (192.168.254.x) IP address.
To confirm connectivity, ping the address or use 'tracert 192.168.254.x' to check the route."