3COM 3CR17253-91 Switch

Ports 48 auto-negotiating 10BASE-T/ 100BASE-TX/ 1000BASE-T ports * 4 of which are dual-personality operating as 10/ 100/ 1000 or Gigabit SFP * RPS power port ( -48 VDC) ; * RJ-45 console port * 2 dedicated stacking ports * 1 optional module slot * IEEE 802.3af inline power on 10/ 100/ 1000 ports Manageable Yes * 3Com Network Supervisor, 3Com Network Director, 3Com Enterprise Management Suite * Web-based GUI, SNMP v1/ 2/ 3, telnet, CLI, SSH, RMON-1 ( statistics, history, alarms, events) , multiple software images, bank swap, statistics gathering and reporting, remote polling/ ping ( unicast mode only) , software backup/ restore, Xmodem, FTP, TFTP, telnet, IP address allocation via manual/ DHCP/ BOOTP Switching features * Layer 2 o IEEE 802.Q VLANs, 802.3ad LACP, 802.3x full-duplex flow control, 802.1D STP, 802.1w RSTP, Fast Start with BDPU protection, IGMP v1/ v2 multicast filtering * Layer 3 o Hardware-based routing, ECMP, ARP, virtual interfaces, static/ dynamic routing, RIPv1/ v2, OSPF, ASIC Layer 3 forwarding, PIM-DM, PIM-SM, IGMP v1/ v2 snooping, DHCP Relay Power Supply 50/ 60 Hz AC; 90-240 VAC input; supports multiple power modes: AC-only, AC and DC, DC-only Others Scalable stackable design with resilient stacking up to eight units high, or up to 448 Gigabit Ethernet ports ( when outfitted with optional 8-port SFP-based expansion module) .