3COM SuperStack 3 4500 26-Port Network Switch 24x 10/100 2x Gigabit 3CR17561-91

Product Brand: 3Com
Product Condition: Used
Excluding VAT: £19.00
Including VAT: £22.80
3COM SuperStack 3 4500 26-Port Network Switch


In Good Condition, Full Working Order


Includes Rack Ears


  • 1 x 3COM SuperStack 3 4500 26-Port Network Switch 24x 10/100 2x Gigabit 3CR17561-91
  • Brand: 3com
  • Model: 3CR17561-91
  • Standards: 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), 802.3i (10BASE-T), 802.3u (Fast Ethernet), 802.3x (Flow Control), 802.3z (Gigabit Ethernet)
  • Primary Ports:
    • 24 x 10BASE-T/100BASE-TX ports
    • 2 x dual-personality Gigabit port pairs
  • Primary Port Speed: 10/100Mbps + 1000Mbps
Data Transmission
  • MAC Address Table: 8,000 MAC addresses
  • VLAN Support: Yes
  • Security: 802.1X user authentication: RADIUS authentication, multiple users per port by locking to the MAC address, automatic port assignment of VLANs, multiple RADIUS server realm definitions, (RADA): authenticate devices based on MAC address against RADIUS server, authenticate multiple devices per port, automatic assignment of VLANs to a port specific to the devices attached, PAP, CHAP, EAPoL authentication, for multiple users per port and 1,024 users per fabric, port-based MAC address lockdown using DUD with continuous learning, wirespeed packet filtering in hardware, Layer 2/3/4 ACL filters: source and/or destination MAC address, 16-bit Ethertype, source and/or destination, IP address, TCP source and/or destination port, UDP source and/or destination port, MD5 cipher-text authentication and clear-text authentication for RIP v2 packets and SNMP v3 traffic, trusted MAC and IP address, concurrent sessions; four access-privilege levels, 802.1X network administrator authentication, secure management via SSH v2.0 or SNMPv3, management activity logs automatically recorded for detailed analysis, administrative password recovery
  • Power: AC Line Frequency: 50/60 Hz, Input Voltage: 90-240 VAC, Current Rating: 1.0A maximum
  • Performance: 8.8 Gbps forwarding bandwidth, 6.5 million packets per second
  • Stacking: Up to 8 switch units, 384 10/100 ports; Single IP address and management interfaces for stack-wide control
  • Layer 2: 802.1Q Port-based VLANs: 256, 802.3ad (LACP), Manual aggregation Trunk groups: 13 groups (26-port), 8 10/100 ports or 2 Gigabit ports per group, autonegotiation of port speed and duplex, 802.3x full-duplex flow control, back pressure flow control for half-duplex, 802.1D (STP), 802.1w (RSTP), BPDU protection included in Fast Start, Internet Group Management Protocol (IGMP) v1 and v2 snooping, IGMP Querier, filtering for 128 multicast groups
  • Layer 3: Hardware-based routing, static routes: 12 in addition to the default address, dynamic / static ARP entries : 1990 / 10, IP interfaces: 4, RIP, v1 and v2: 2K via default route plus 10 locally learned routes, IGMP v1 and v2 snooping, DHCP Relay: 2 KB max
  • Convergence: Eight hardware queues per port, 802.1p (CoS/QoS) on egress DSCP EF for prioritization of VoIP traffic, Weighted Round Robin, Egress rate limiting, port-based, Application and protocol blocking
  • 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: CLI via the console port or Telnet, embedded web management interface, system configuration with SNMP v1, 2, and 3, RMON groups: statistics, history, alarm, and events, ACL/QoS statistics, comprehensive IP interface statistics and rates, 1-to-1 port mirroring, ability to apply QoS profile to mirror port, forwarding only certain traffic types and preventing oversubscription of copy port, detailed alarm/debug information, supports ping and traceroute, backup and restore of software image, network debugging tools: DHCP Relay, UDP Helper, multiple configuration file support, Xmodem, FTP, TFTP
Boot Log:

System View:return to User View with Ctrl+Z.
3Com Corporation
SuperStack 3Switch 4500 26-Port Software Version 3Com OS V3.01.00s56p01
Copyright(C)2003-2005 3Com Corporation. All RightsReserved.
SuperStack 3Switch 4500 26-Port uptime is 0 week, 0 day, 0 hour, 1 minute
SuperStack 3Switch 4500 26-Port with 1 MIPS Processor
64M bytes DRAM
8196K bytes Flash Memory
Config Registerpoints to FLASH

CPLD Version isCPLD 003
Bootrom Versionis 1.00
[Subslot 0] 24 FE+ 4 GE Hardware Version is 00.00.00



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