3Com 3CR17250-91, SWITCH 5500G-EI, 20xGLAN, 4xSFP + EXPRESS SERVICE AHR 8x5xNBD na 3roky

Ports: 20 auto-negotiating 10BASE-T/100BASE-TX/1000BASE-T ports configured as auto MDI/MDIX; 4 dual-personality 10/100/1000 or SFP Gigabit ports; RPS power port (-48 VDC); RJ-45 console port; 2 dedicated stacking ports; 1 optional module slot Performance: 184.0 Gbps switching capacity, 136.9 Mpps forwarding rate, maximum (with 2-port 10-Gigabit module); 107.1 Mpps forwarding rate, maximum (with no optional modules) Stacking: Up to 8 switch units, 448 Gigabit ports, with 16 10-Gigabit ports; 3Com XRN® Stacking linked in active/active load-sharing configuration via built-in dedicated 48 Gbps stacking ports (96 Gbps full duplex) Layer 2: 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: 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 Resiliency: IEEE 802.3ad LACP, hot-swappable switch units, DC RPS provides N+1 power redundancy, seamless failover between AC and DC modes Convergence: Weighted Round Robin/Fair/Strict Priority Queuing, IEEE 802.1p Class of Service/Quality of Service (CoS/QoS), IPv6 classification, prioritization and filtering, ingress/egress rate limiting, webcache-based bandwidth management Security: RADIUS; PAP/CHAP/EAPoL (EAP over LAN) authentication; session accounting; SSHv1.5; Access Control Lists; packet filtering; SNMP v3 encryption, IEEE 802.1X Network Login; authentication, VLAN autoinitiation and QoS profiling; multilevel access privileges; administrative password recovery; management activity logs Operating system: 3Com Operating System; shared with 3Com Switch 8800, 7700 and Router 6000 3Com management: 3Com Network Supervisor, 3Com Network Director, 3Com Enterprise Management Suite Other management: Web-based GUI, SNMP, telnet, CLI, RMON-1 (statistics, history, alarms, events), SMON, 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 Network debugging tools: DHCP tracker, UDP helper, traceroute, 1-1 traffic mirroring (standalone unit only) Built-In power supply: 50/60 Hz AC; 90-240 VAC input; supports multiple power modes: AC-only, AC and DC, DC-only DC Redundant Power Supply (RPS): Available standards-based DC RPS designed by Eaton Powerware Corporation, leading provider of IEEE standards: IEEE 802.1D (STP), 802.1p (CoS), 802.1Q (VLANs), 802.1w (RSTP), 802.1X (Security), 802.3 (Ethernet), 802.3ad (Link Aggregation), 802.3ab (1000BASE-T), 802.3ae (10G Ethernet), 802.3i (10BASE-T), 802.3u (Fast Ethernet), 802.3x (Flow Control), 802.3z (Gigabit Ethernet) Standard: EN 60068 (IEC 68) Emissions: CISPR 22 Class A, FCC Part 15 Class A, EN 55022 1998 Class A, ICES-003 Class A, VCCI Class A, EN 61000-3-2 2000, 61000-3-3 Immunity: EN 55024 Safety agency certifications: UL 60950, IEC 60950-1, EN 60950-1, CAN/CSA-C22.2 No. 60950 Dimensions: Height: 43.6 mm (1.7 in or 1U); width: 440 mm (17.3 in), 450 mm (17.7 in) Package Contents Switch Rack mount kit Rubber feet DC RPS connector User's guide