What is the switching capacity and stacking capability?

Switching capacity is 240 Gbps with 16,000 MAC addresses. Uses 3Com XRN technology for stacking up to 8 units at 48 Gbps bandwidth (96 Gbps full duplex), enabling up to 448 Gigabit ports managed as one logical switch.

Does it support Layer 3 routing protocols?

Yes, supports OSPF, RIP-1/2, IGMPv2/IGMP, PIM-SM/DM, and static IP routing, plus Layer 2 features like IEEE 802.1Q VLANs, STP, and LACP for comprehensive routed and switched networks.

What management and security features are available?

Management via HTTP, Telnet, SNMP/SNMP v3, RMON 1. Security includes CHAP, PAP, RADIUS, SSH, DES/MD5 encryption, and network login support for secure remote administration.

What are the physical dimensions and form factor?

1U rack-mountable with dimensions 17.3 inches width, 17.7 inches depth, 1.7 inches height. AC power input 100-240 V, with 64 MB internal memory, 16 MB flash, 32 MB packet buffer.

Which IEEE standards does it comply with?

Complies with IEEE 802.1D/Q/p/s/w/x, 802.3/i/u/x/z/ab/ad/ae for bridging, VLANs, QoS, PoE, Gigabit Ethernet, LACP, and 10G support, ensuring interoperability in standards-based environments.

3CR17251-91 - 3Com 5500G-EI 48 x 10/100/1000 Mbps RJ-45 ports Switch

Name: 3CR17251-91 - 3Com 5500G-EI 48 x 10/100/1000 Mbps RJ-45 ports Switch
Brand: 3Com
SKU: 3CR17251-91

3CR17251-91 - 3Com 5500G-EI 48 x 10/100/1000 Mbps RJ-45 ports Switch | US IT Hardware

Product overview

The 3Com Switch 5500G-EI 48-Port (SKU 3CR17251-91) is a stackable Layer 3 managed Gigabit Ethernet switch from the Superstack 4 5500G series, designed for enterprise environments. It provides 48 x 10/100/1000 Mbps RJ-45 ports and 4 x dual-personality 10/100/1000 or SFP Gigabit ports (shared), plus 1 expansion module slot for Gigabit or 10-Gigabit connectivity. With 240 Gbps switching capacity, 16,000 MAC address table, and support for OSPF, RIP, IGMP, PIM-SM/DM routing protocols, it enables advanced Layer 3 functions. 3Com XRN stacking technology allows up to 8 units (448 ports total) at 48 Gbps bandwidth (96 Gbps full duplex). Management via HTTP, Telnet, SNMP v3, RMON includes RADIUS, SSH authentication. 64 MB RAM, 16 MB flash, 1U rack-mount form factor (17.3 x 17.7 x 1.7 inches). Complies with IEEE 802.1Q, 802.3ab, 802.1x standards for secure, resilient networking in data centers and campuses.

48x Gigabit RJ-45 + 4x SFP dual-personality ports
240 Gbps capacity, 16K MAC table, XRN stacking
L3 routing: OSPF, RIP, PIM-SM/DM protocols
IEEE 802.1Q VLAN, IGMP snooping, LACP aggregation
SNMP v3, SSH, RADIUS secure management
1U rack-mount, 64 MB RAM, 16 MB flash memory

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Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	3CR17251-91
Brand	3Com
Condition	New
Model	5500G-EI
Stackable	Yes; up to 8 units high; 48 Gbps stacking bandwidth (96 Gbps full duplex); up to 448 Gigabit Ethernet ports when stacked with optional 8-port SFP expansion modules
Technology	3Com XRN (eXpandable Resilient Networking) Stacking Technology
Flow Control	IEEE 802.3x flow control; auto-negotiation; auto-uplink (auto MDI/MDI-X)
Product Line	3Com Superstack 4 5500G
Product Type	Stackable Layer 3 Managed Gigabit Ethernet Switch
VLAN Support	IEEE 802.1Q VLAN support; IGMP snooping

Compatible systems

No specific system or OS compatibility data found in search results; this is a network switch and operates independently of host OS.

Best for

Enterprise Core Switching
Delivers 240 Gbps switching capacity and 48 Gigabit ports for high-throughput core networks, with XRN stacking up to 8 units for up to 448 ports managed as one entity.
Data Center Aggregation
Supports Layer 3 routing (OSPF, RIP) and 10-Gigabit expansion slot for aggregating traffic from access switches to core infrastructure.
Campus Distribution
IEEE 802.1Q VLANs, IGMP snooping, and LACP link aggregation enable segmented, resilient distribution layer connectivity across campus environments.
Secure Enterprise Routing
Features SNMP v3, SSH, RADIUS authentication, and PIM multicast routing for secure, policy-based traffic management in routed networks.

Frequently asked questions

What ports does the 3Com Switch 5500G-EI 48-Port have?

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MAC Address Table	16,000 entries

Routing Protocols	OSPF; RIP-1; RIP-2; IGMPv2; IGMP; PIM-SM; PIM-DM; static IP routing

Switching Protocols	Ethernet; Spanning Tree Protocol (STP); Link Aggregation (LACP)

Management Interface	HTTP; Telnet; SNMP; SNMP v3; RMON 1

Flash Memory	16 MB
Internal Memory	64 MB
Packet Buffer Memory	32 MB

Switching Capacity	240 Gbps

Network Login	Supported
Encryption Algorithms	DES; MD5
Authentication Methods	CHAP; PAP; RADIUS; Secure Shell (SSH)

Power Source	AC input; 100-240 V

Depth	17.7 inches
Width	17.3 inches
Height	1.7 inches
Form Factor	Rack-mount; 1 rack unit (1U)

Interface/Ports

Uplink Ports	4 x dual-personality 10/100/1000 or SFP Gigabit ports (shared SFP)
Ethernet Ports	48 x 10/100/1000 Mbps RJ-45 ports
Expansion Slots	1 x expansion module slot for additional Gigabit or 10-Gigabit Ethernet connectivity
Console Interface	Console port (RJ-45)

3Com 5500G-EI 48 x 10/100/1000 Mbps RJ-45 ports Switch

Product overview

Featuring

Compatible systems

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Frequently asked questions

Details

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Physical Characteristics

Interface/Ports