I just installed CCTV Samsung Model SRN 473S NVR Recorder and I use the router gateway was Balance One Core after I configure and plugin LAN Cable to LAN Port 1 a which assignment VLAN 100 for CCTV only I found any problem with LAN still notice report LAN down often please see details as the
Hello
Can you try forcing that port to 100Mbps?
Go to Network / Port Settings and change the Speed from auto to fixed 100Mbps
See if you get the same error after this.