... /STP (802.1w/1D) Management: Web, Telnet, Serial Console, SNMP Control: VLAN/GVRP, QoS, IGMP Snooping/Query, LACP, Rate Limit Security ... create reliability in your network, the EKI-7659CPI comes equipped with a proprietary redundant network protocol -- X-Ring that was developed ... by Advantech, which provides users with an easy way to establish a redundant Ethernet network ...