3Com Switch 4500 Family Gegevensblad - Pagina 6
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6
SPECIFICATIONS
All information in this section is
relevant to all members of the 3Com
Switch 4500 10/100 family, unless
otherwise stated.
CONNECTORS
26-port non-PWR
26 total available ports, comprised of:
• 24 auto-negotiating 10BASE-T/
100BASE-TX ports configured as
auto MDI/MDIX
• 2 dual-personality Gigabit port
pairs, configurable as 10BASE-
T/100BASE-TX/1000BASE-T or SFP
26-port PWR
26 total available ports, comprised of:
• 24 auto-negotiating 10BASE-T/
100BASE-TX ports configured as
auto MDI/MDIX; IEEE 802.3af
in-line power
• 2 dual-personality Gigabit SFP port
pairs
Unit ships with two 1000BASE-T SFPs
50-port models
50 total available ports, comprised of:
• 48 auto-negotiating 10BASE-T/
100BASE-TX ports configured as
auto MDI/MDIX; IEEE 802.3af in-
line power for PWR model
• 2 dual-personality Gigabit SFP port
pairs
Units ship with two 1000BASE-T SFPs
PERFORMANCE
26-port
8.8 Gbps switching capacity,
maximum
6.5 Mpps forwarding rate, maximum
50-port
13.6 Gbps switching capacity,
maximum
10.1 Mpps forwarding rate, maximum
All models
Switch fabric bandwidth: 32 Gbps
Wirespeed performance across all
ports within stack or fabric
Store-and-forward switching; latency
<10 µs
2 Gbps full-duplex stacking bandwidth
3Com
Switch 4500 10/100 Family
®
LAYER 2 SWITCHING
8,000 MAC
addresses in address table
16 static MAC addresses, in addition to
default address
256 Port-based VLANs (IEEE 802.1Q)
IEEE 802.3ad Link Aggregation
Control Protocol (LACP); automated
and manual aggregation
Per-switch trunk groups: 13 groups
(26-port); 25 groups (50-port)
8 10/100 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
Supports broadcast storm suppression
per VLAN
IEEE 802.1D Spanning Tree Protocol
(STP)
IEEE 802.1s Multiple Spanning Tree
Protocol (MSTP)
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 g
roups
LAYER 3 SWITCHING
Hardware
based routing
12 static routes, in addition to default
address
1,990 dynamic Address Resolution
Protocol (ARP) entries; 16 static
4 IP interfaces
Routing Information Protocol (RIP)
v1 and 2; supports 2,000 entries
Dynamic Host Configuration Protocol
Relay (DH
CP Relay)
CONVERGENCE
dware queues per port
Eight har
Weighted Round Robin (WRR)
IEEE 802.1p Class of Service/Quality
of Service (CoS/QoS) on egress
IEEE 802.1p QoS marking/remarking
Auto prioritization of voice traffic
determined by vendor OUI
DiffServ Code Point Expedited
Forwarding (DSCP EF) remarking for
prioritization of VoIP traffic
Traffic shaping with port-based egress
rate limiting; application and protocol
blocking
IEEE 802.3af Power over Ethernet
standards-compli
ant (PWR models)
POE (PWR MODELS ONLY)
2.3af PoE injection into
IEEE 80
Category 5 or 5e LAN wiring (300 W
total maximum)
Available standards-based DC
supplemental power system supplies
up to 15.4 W each of power to all PoE
ports in a switch or stack (5,914 W
total maximum)