Netcelero

Only the private IP address that you see in the screenshot will work within your network, unless you have a really good router with NAT reflection set up the public IP address ( the 202.96.128.88 ) won’t work from within your network only from outside.

A Switch isn’t a hub a switch learns the ports that mac addresses are on, unicast packets are only sent out ports for their destination not out every port as in the case of a hub. So as long as your NVR and home router are on different ports on the switch the router will not see any of the camera packets, except broadcast packets. A camera unless compromised will send very few broadcast packets. Managed switches are only needed where you want to be able to either apply VLANs or remotely enable or disable a switch port.

If the CCTV camera is on the same subnet as the Pc after you ping use “arp –a” on the command line to see the mac address. Sometimes a device doesn’t reply to ping but does to arp. Also we use Wireshark (in windows) and TCPdump in linux to watch layer 2 arp requests to spot if a CCTV camera has been given the incorrect default gateway or IP address.

You can use SNMP monitoring of SNMP enabled switches (most decent switches support SNMP), what you want to look for is drops/loss and collisions they point to problems in the physical cable connection. If there is loss or drops this can impact the TCP sliding window for TCP sessions (if you are using TCP for the camera stream) which can affect your ability to stream in HD. Also some switches support PoE power use in SNMP which could be handy for tracking power usage.