POE Switch CKP Series DIN-Rail Industrial POE Switches IGMPv1/v2, GMRP, GVRP, SNMPv1/v2C/v3 DHCP Service/Client, TFTP, SNTP POE SwitchIndustrial Ethernet switches ... Class of ServiceIEEE 802.3X for AuthenticationIEEE 802.3ad for Port Trunk with LACP Protocols:IGMPv1/v2, GMRP, GVRP, SNMPv1/v2C ... with IEEE802.3af,Supports up to 15.4 watts per port-p+: Compliant with IEEE802.3at,Supports up to 25 watts ...