3COM SUPERSTACK 3 4924 LAYER3 LAYER4 GIGABIT SWITCH

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3COM Superstack 3 4924 Layer3 Layer4 Gigabit Switch
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Please Note : This Switch is higher performance than the Cisco Catalyst 2960G, 3650G, 3750G. Very robust and feature rich switch. The switch is fully tested, inspected by a Cisco Engineer. The Switch has been updated to the latest 3COM Firmware. It can be managed via a Web Browser, GUI Manageable, or the Command Line Interface. Very easy to administer. Ideal for Small, Medium and Large Business, Server Farm, Data Center, Aggregation Switch and Bandwidth-Intensive Applications. This switch is not only layer 2, layer 3 but it is a layer 4 switch as well. The Switch is populated with another 4 Gigabit ports Module (4 Ports 1000Base-T module, Part Number 3C17711, it can accepte fiber optic interfaces with the right Module, please let us know if you wanna replace the copper with fiber optic) so a total of 28 Gigabit ports this switch has. A lot of Administration Guide, User Guides and software utilities will come with this switch on a CD.

Layer 2/3/4 Gigabit switching ideal for server aggregation
Choose from among 12- and 24- port models with fiber or copper connectivity
Combine multiple units using 3Com XRN technology for resiliency without complexity
24 Ports Gigabit Switch.

Unbeatable Resilience:
The SuperStack 3 Switch 4900 family ofproducts supports 3Com’s XRN® technology providing outstanding resilience and reliability, at double the performance of traditional resilient solutions. With XRN technology, Layer 2 and Layer 3 networks can be created with no single point of failure,
but still utilizing the full performance of the network.

Performance:
3Com’s custom ASIC architecture delivers wirespeed, non-blocking Gigabit Ethernet switching across all ports, minimizing server farm and network congestion. Further scale performance using XRN technology, with two units operating together as a single management switching entity.

Advanced Network Control:
Advanced Layer 2/4 functionality such as multicast filtering, virtual LANs, and multilayer traffic classification and prioritization improve traffic control across the network. XRN technology supports two geographically distributed switches managed as a single Layer 2 / Layer 3 entity.

Layer 3:
Switches support RIP v1/v2, OSPF, CIDR and UDP helper; the resilient capabilities of XRN technology allow two units to share IP interfaces eliminating the need for complex implementations such as VRRP. Advanced Security Capabilities Secure network resources from unauthorized access with RADIUS client support and Access Control Lists.

High Availability:
Robust features include link aggregation, support for Rapid Spanning Tree protocol, an optional Redundant Power Supply system, and e-mail or pager status notification, all ensuring maximum uptime for critical applications.

Powerful Management:
Comprehensive support within the 3Com management application software suite, including within the standalone package 3Com Network Director and with 3Com Network Administrator for HP OpenViewbased management.


Technical Specifications:

Switching Capacity:
56Gbps

Forwarding Rate:
41.6Mpps (Million Packet Per Second)

Store and Forward Switching Latency:
2.7 microseconds for all models

MAC Addresses:
12K MAC addresses

VLAN:
30 VLANs (IEEE 802.1Q)

Link Aggregation:
Manual and LACP Link Aggregation (IEEE 802.3ad). 13 groups/4 ports in each

Auto Negotiation:
Auto-negotiation of port speed, duplex, and connection (MDI/MDIX)

Traffic Control:
IEEE 802.3x full-duplex flow control
Back pressure flow control for half-duplex
Supports Broadcast Storm Suppression

Spanning Tree:
IEEE 802.1D Spanning Tree Protocol (STP)
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP), backward-compatible with STP
Fast-start mode
Spanning tree enable/disable per port or per VLAN

Routes:
Hardware-based routing
2,000 IP routes
100 Static Routes
5,000 ARP entries
64 IP interfaces

IP Routing:
IP Multinetting (multiple IP interfaces per VLAN)
CIDR (Classless Internet Domain Routing)
RIP (Routing Information Protocol), v1 and v2
OSPF (Open Shortest Path First), 4 areas with 64 adjacencies, ASBR support for static and default routes

Multicast:
Filtering for 128 multicast groups
IGMP (Internet Group Management Protocol) snooping on Layer 2 interfaces
IGMP v1 and v2
IGMP Querier

Network Protocol:
DHCP Relay (Dynamic Host Configuration Protocol Relay)
UDP (User Datagram Protocol) Helper
ARP (Address Resolution Protocol)

Access Control Lists:
VLAN-based ACLs, Filtered on destination IP address / mask

Priority Queues:
Four hardware queues per port
Weighted Round Robin queuing

Traffic Prioritization, Priority based on:
IP address
IEEE 802.1p Class of Service (CoS) VLAN priority
TCP/UDP destination port number
DSCP (DiffServ Code Point)
Ethertype
Default port priority
Auto classification of 3Com NBX® telephony traffic

RESILIENCY:
3Com XRN Technology support
Dual software images
Backup and restore of switch settings

Device Management:
Local or RADIUS management of switch passwords
Web-based management
Command line interface (CLI)
Serial (9-pin D-type connector)
Telnet
SNMP v1

3Com Management Applications:
3Com Network Supervisor for basic, turn-key network management for small and medium businesses
3Com Network Director for comprehensive, turn-key network management for the enterprise
3Com Enterprise Management Suite for flexible, extensible management in advanced enterprise IT environments

Software:
Dual software images
Backup and restore
TFTP configuration, upload/download
TFTP agent: upload
Mirror Port /RAP (Roving Analysis Port): one-to-one

RMON:
Seven Groups: Statistics, History, Alarms, Host, HostTopN, Matrix, Events
IP Address allocation DHCP
BOOTP
Manual
Auto IP

Industry Standards Supported:
Ethernet Protocols
IEEE 802.1D (STP)
IEEE 802.1p (CoS)
IEEE 802.1Q (VLANs)
IEEE 802.1w (RSTP)
IEEE 802.3ad (Link Aggregation)
IEEE 802.3i (10BASE-T)
IEEE 802.3u (Fast Ethernet)
IEEE 802.3x (Flow Control)
IEEE 802.3z (Gigabit Ethernet)
Administration Protocols
RFC768 (UDP)
RFC791 (IP)
RFC792 (ICMP)
RFC793 (TCP)
RFC826 (ARP)
RFC854 (Telnet)
RFC1350 (TFTP)
RFC1542 (BOOTP/DHCP)
RFC2616 (HTTP)
SNMP Standards
RFC1157 (SNMP Protocol)
RFC1213 (SNMP MIB II)
RFC1215 (SNMP MIB II Traps)
RFC1493 (Bridge MIB)
RFC1659 (RS232 MIB)
RFC1757 (RMON I)
RFC2021 (RMON II Probe Config)
RFC2233 (Interfaces MIB)
RFC2618 (RADIUS Authentication Client MIB)
RFC2665 (EtherLike-MIB)
RFC2620 (RADIUS Accounting Client MIB)
RFC2674 (Bridge MIB Extensions)
RFC2668 (MAU MIB)
RFC2925 (Traceroute, Remote PING, Lookup MIB)
Routing Protocols
RFC1058 (RIP)
RFC1519 (CIDR)
RFC1723 (RIP v2)
RFC 1724 (RIP v2 Extensions)
RFC1850 (OSPF MIB)
RFC2328 (OSPF Version 2)
RFC2096 (IP Forwarding Table)
RFC2131 (BOOTP/DHCP Relay)

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