XDK 2000 switchseries is a new generation of L2 switches with high performance, multiservice,high reliability and high security that are independently developed by XDK.They support all kinds of connections varying from 10/100M to 1000M, so thenetwork can be configured flexibly according to actual needs. The switches canaccess all Ethernet or fast-Ethernet devices, so they can be very compatiblewith the existing devices.. Properties Excellentperformance n 32Gbps backplane bandwidth, hardware forwarding andwire-speed L2 packet forwarding rate n Gigabit optical-fiber transmission with up to 80Kmdistance and directly connecting the MAN backbone network Highsecurity and reliability n Providing multiple user authentication modes such as802.1x authentication n Powerful ACL and hardware supporting L2 to L7 datafiltration n Port-MAC-IP bind n Special ARPinvasion detection to effectively stop ARP cheat n Hardware IPv6 ACL Flexibleand various management modes n Automatically identifying the straight-through cableand the intercrossed cable n Adopting the cluster technology; supporting devicecascading; managing uniquely through a unique IP address; saving addressresources n Multiple management modes such as Console port,Telnet, Web and SNMP are supported. Powerfulflow and broadcast management n Detecting and limiting broadcast stormsautomatically and supporting IGMP snooping to limit broadcast flooding n Supporting flow control in full-duplex mode orhalf-duplex mode n The rate limitation in a minimum step of 64K issupported on the Ethernet interface. n Supporting IP multicast and QoS n Flexible QinQ realizes the QinQ function based onthe five-element group. Variedprotocols n POE switches support 802.3af power supply on alltheir ports. n POE switches already support 802.3at power supply.The maximum power supply on each port can reach up to 30W. n POE switches support the configuration ofpower-supply priority, guaranteeing continuous power supply at those keynetwork nodes. n The POE switches support configuring the powerconsumption of power supply on their ports, saving the power and reducingusers' cost.