Hello. I have a 25 Summit X460G2-48p with Data, VoIP and CCTV, I have a VLAN configured for cctv and elrp is configured. But sometimes I have alrams of LOOP in cctv vlan. I don´t no what is the problem in my switches. I have to configure somthing else for video ??
you are using ELRP to block the ingress port, that is the port receiving the ELRP frame sent from the switch. This can help against loops local to the switch from one access port to the other, but if there is a loop involving another switch in the network, ELRP will detect it, but it cannot block it, because the ELRP frame is received on the uplink (which is exempted from ELRP disable).
If you use ELRP to block the egress port, ELRP can block the access port that is part of the loop, breaking the loop.