All information in this section is relevant to all members of the
3Com Switch 4210G Gigabit family, unless otherwise stated.
CONNECTORS
24-port 3CRS42G-24-91
24 auto-negotiating 10BASE-T/100BASE-TX/1000BASE-T ports,
4 of which are dual-personality 10/100/1000 or 100/1000 SFP ports.
2 rear module expansion slots each supporting up to two optional
10-Gigabit ports.
Support for redundant power system (RPS).
RJ-45 console port.
48-port 3CRS42G-48-91
48 auto-negotiating 10BASE-T/100BASE-TX/1000BASE-T ports,
4 of which are dual-personality 10/100/1000 or 100/1000 SFP ports.
2 rear module expansion slots each supporting up to two optional 10-
Gigabit ports.
Support for redundant power system (RPS).
RJ-45 console port.
24-port PWR 3CRS42G-24P-91
24 auto-negotiating 10BASE-T/100BASE-TX/1000BASE-T ports,
4 of which are dual-personality 10/100/1000 or 100/1000 SFP ports.
IEEE 802.3af in-line power on all 10/100/1000 ports; PoE budget 370W.
2 rear module expansion slots each supporting up to two optional
10-Gigabit ports.
Support for redundant power system (RPS).
RJ-45 console port.
PERFORMANCE
24-port 3CRS42G-24-91 and 3CRS42G-24P-91
128.0 Gbps switching capacity
95.2 Mpps forwarding rate
48-port 3CRS42G-48-91
176.0 Gbps switching capacity
131.0 Mpps forwarding rate
All models
Wirespeed performance across ports
Store-and-forward switching; latency <10 μs
Stacking Performance
With CX4 local connection, each port operates at 12 Gbps, or 24 Gbps full
duplex. total bandwidth is 48 Gbps using two ports per switch, or 96 Gbps
using four ports per switch.
LAYER 2 SWITCHING
16K MAC addresses in address table
1,024 static MAC addresses (in addition to default address)
Jumbo Frame support
4,094 Port-based VLANs (IEEE 802.1Q)
IEEE 802.3ad Link Aggregation Control Protocol (LACP); automated and
manual aggregation
GARP VLAN Registration Protocol (GVRP)
IEEE 802.1 Q-in-Q double-tagged VLANs
Local switch log-in password
Switch login via RADIUS
Trusted IP Management Addresses
Isolated port in VLAN
Blackhole MAC address
Auto-VLAN assignment based on log-in
6 trunk groups per switch
8 10/100/1000 ports or 2 Gigabit ports per group
Auto-negotiation of port speed and duplex IEEE 802.3x full-duplex
flow control
Back pressure flow control for half duplex
IEEE 802.1D Spanning Tree Protocol (STP)
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
Bridge Protocol Data Unit (BPDU) protection
Internet Group Management Protocol (IGMP) snooping (v1, 2 and 3) on
Layer 2 interfaces
Filtering for 128 multicast groups
IEEE 802.1s Multiple Spanning Tree Protocol
Spanning Tree enable / disable per port
Spanning Tree fast-start mode
LAYER 3 SWITCHING
DHCP snooping
Hardware based routing
32 static routes
8 IP interfaces
CONVERGENCE
Eight hardware queues per port
Weighted Round Robin queuing
Strict Priority queuing
IEEE 802.1p Class of Service/Quality of Service (CoS/QoS) on egress
Traffic shaping with port-based egress rate limiting
Application and protocol blocking
Auto VLAN assignment for voice traffic determined by vendor OUI
SECURITY
IEEE 802.1X Network login user authentication:
• EAP over LAN (EAPoL) transport with EAP-MD5, PAP, CHAP, PEAP
and EAP-TLS authentication
• Multiple users per port
• 1,024 online users, max.
Local and RADIUS server authentication
RADIUS session accounting
TACACS+ network login
Automatic VLAN assignment via RADIUS server
Wirespeed packet filtering in hardware
ACLs filter at Layers 2, 3 and 4:
• Source/destination MAC address
• Ethernet type
• Source/destination IP address
• Source/destination TCP port
• Source/destination UDP port
RADIUS Authenticated Device Access (RADA): Authenticate devices based
on MAC address against RADIUS server and assign VLAN ID and ACL
Port-based MAC address Disconnect
Unknown Device (DUD)
ARP attack detection and suppression
Web authentication
IEEE 802.1X user authentication of switch management on switch Telnet
and console sessions; four access privilege levels
Hierarchical management and password protection for management interface
SNMP v3 encryption
SSH v2
Denial of Service protection
SINGLE IP ADDRESS MANAGEMENT
Advanced IRF stacking on the Switch 4210G allows for four-high stacks
with features including dynamic link aggregation for simplified
management and network scalability.
Clustering provides single IP address and management interfaces for
centralized control. Up to 255 devices per cluster across 3Com Switch
4210, 4210G, 4500, 4500G, 4800G, 5500 and 5500G devices.
MANAGEMENT
CLI via console or Telnet
Embedded web management interface
sFLOW performance monitoring
System configuration with SNMP v1, 2c and 3
Comprehensive statistics, including ACL/QoS and IP interface
IPv6 management including pingv6, tracertv6, Telnetv6, TFTPv6, DNSv6
and ARPv6
Remote Monitoring (RMON) groups statistics, history, alarm and events
Many-to-1 port mirroring
Detailed alarm and debug information
Supports ping, remote ping and traceroute
SPECIFICATIONS
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