Reference our Specs

24 Gbps switching fabric (Cisco Catalyst 3550-12G and 3550-12T), 13.6 Gbps switching fabric (Cisco Catalyst 3550-48), 8.8 Gbps switching fabric (Cisco Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

12 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Cisco Catalyst 3550-12G 3550-12T), 6.8 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Cisco Catalyst 3550-48), 4.4 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Cisco Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

17.0 Mpps forwarding rate for 64-byte packets (Cisco Catalyst 3550-12G and 3550-12T), 10.1 Mpps forwarding rate for 64-byte packets (Cisco Catalyst 3550-48), 6.6 Mpps forwarding rate for 64-byte packets (Cisco Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

4 MB memory architecture shared by all ports (Cisco Catalyst 3550-12G, 3550-12T, and 3550- 48), 2 MB memory architecture shared by all ports (Cisco Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

64 MB DRAM and 16 MB Flash memory

Configurable up to 12,000 MAC addresses (Cisco Catalyst 3550-12G and 3550-12T), Configurable up to 8,000 MAC addresses (Cisco Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and3550-24-FX)

Configurable up to 24,000 unicast routes (Cisco Catalyst 3550-12G and 3550-12T), Configurable up to 16,000 unicast routes (Cisco Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

Configurable up to 8,000 multicast routes (Cisco Catalyst 3550-12G and 3550-12T), Configurable up to 2,000 multicast routes (Cisco Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

Configurable Maximum Transmission Unit (MTU) of up to 2,000 Bytes for bridging of MPLS tagged frames (Cisco Catalyst 3550-12G and 3550-12T), Configurable Maximum Transmission Unit (MTU) of up to 1,546 Bytes for bridging of MPLS tagged frames (Cisco Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

10Base-T ports: RJ-45 connectors; two-pair Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling

100Base-TX ports: RJ-45 connectors; two-pair Category 5 UTP cabling

1000Base-T ports: RJ-45; two-pair Category 5 UTP cabling

1000Base-T GBIC-based ports: RJ-45 connectors; two-pair Category 5 UTP cabling

1000Base-SX, -LX/LH, -ZX, and CWDM GBIC-based ports: SC fiber connectors, single- mode or multimode fiber

Cisco GigaStack GBIC ports: copper-based Cisco GigaStack cabling

Management console port: 8-pin RJ-45 connector, RJ-45-to-RJ-45 rollover cable with RJ-45-to-DB9 adapter for PC connections; for terminal connections, use RJ-45-to-DB25 female data-terminal-equipment (DTE) adapter (can be ordered separately from Cisco, part number ACS-DSBUASYN=)

Customers can provide power to a switch by using either the internal power supply or the Cisco RPS. The RPS 300 is compatible with all Cisco Catalyst 3550 models except the 3550-24-DC and 3550-24 PWR. The RPS 675 is compatible with all Cisco Catalyst 3550 models except the 3550-24-DC. The connectors are located at the back of the switch.

Internal Power Supply Connector

• The internal power supply is an auto-ranging unit.

• The internal power supply supports input voltages between 100 and 240 VAC.

• Use the supplied AC power cord to connect the AC power connector to an AC power outlet.

Cisco RPS 675 Connector

• The connector offers connection for an optional Cisco RPS 675 that uses AC input and supplies DC output to the switch.

• The connector offers a 675-watt redundant power system that can support six external network devices and provides power to one failed device at a time.

• The connector automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic.

• Attach only the Cisco RPS 675 (model PWR675-AC-RPS-NI=) to the redundant power supply receptacle with this connector. See above for Cisco Catalyst 3550 RPS compatibility.

Cisco RPS 300 Connector

• The connector offers connection for an optional Cisco RPS 300 that uses AC input and supplies DC output to the switch.

• The connector offers a 300-watt redundant power system that can support six external network devices and provides power to one failed device at a time.

• The connector automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic.

• Attach only the Cisco RPS 300 (model PWR300-AC-RPS-N1) to the redundant power supply receptacle with this connector. See above for Cisco Catalyst 3550 RPS compatibility.

Per-port status LEDs: link integrity, disabled, activity, speed, and full-duplex indications

System status LEDs: system, RPS, and bandwidth utilization indications

110,332 hours (Cisco Catalyst 3550-12G)

113,658 hours (Cisco Catalyst 3550-12T)

166,356 hours (Cisco Catalyst 3550-24 PWR)

193,000 hours (Cisco Catalyst 3550-24)

163,000 hours (Cisco Catalyst 3550-48)

183,000 hours (Cisco Catalyst 3550-24-DC)

186,000 hours (Cisco Catalyst 3550-24-FX)

Cisco Catalyst 3550-12G and 3550-12T: 190 W (maximum), 650 BTUs per hour

Cisco Catalyst 3550-24: 65 W (maximum), 222 BTUs per hour

Cisco Catalyst 3550-24-DC: 72 W (maximum), 250 BTUs per hour

Cisco Catalyst 3550-24-FX: 85 W (maximum), 290 BTUs per hour

Cisco Catalyst 3550-24 PWR: 525W (maximum), 1790 BTUs per hour

Cisco Catalyst 3550-48: 110 W (maximum), 375 BTUs per hour

AC input voltage/frequency: 100 to 127/200 to 240 VAC (auto-ranging), 50 to 60 Hz

RPS Input

• Cisco Catalyst 3550-12G, 3550-12T, and 3550-48: +12V @ 13A

• Cisco Catalyst 3550-24 and 3550-24-FX: +12V @ 8.3A

• Cisco Catalyst 3550-24 PWR: +12V @ 7.5A and -48V @ 7.8A

DC Input

• Cisco Catalyst 3550-24-DC: -36 to 72VDC @ 2A

2.63 x 17.5 x 15.9 in. (6.7 x 44.5 x 40.4 cm) (Cisco Catalyst 3550-12G and 3550-12T)

1.75 x 17.5 x 17.4 in (4.45 x 44.5 x 44 cm) (Cisco Catalyst 3550-24 PWR)

1.75 x 17.5 x 14.4 in. (4.45 x 44.5 x 36.6 cm) (Cisco Catalyst 3550-24 and 3550-24-DC)

1.75 x 17.5 x 16.3 in. (4.45 x 44.5 x 41.3 cm) (Cisco Catalyst 3550-24-FX and 3550-48)

1.5 RU high (Cisco Catalyst 3550-12G and 3550-12T)

1.0 RU high (Cisco Catalyst 3550-48 and 3550-24, 3550-24 PWR, 3550-24-DC and 3550-24-FX)

16 lb (7.3 kg) (Cisco Catalyst 3550-12G and 3550-12T)

14 lb (6.35 kg) (Cisco Catalyst 3550-24 PWR)

11 lb (5.0 kg) (Cisco Catalyst 3550-24 and 3550-24-DC)

12 lb (5.5 kg) (Cisco Catalyst 3550-24-FX)

13 lb (5.9 kg) (Cisco Catalyst 3550-48)

32 to 113°F (0 to 45°C)

-13 to 158°F (-25 to 70°C)

10 to 85% (non-condensing)

Up to 10,000 ft (3,049 m)

Up to 15,000 ft (4,573 m)

ISO 7770, bystander position operating to an ambient temperature of 30°C:

Cisco Catalyst 3550-12G and 3550-12T: 58 dBa

Cisco Catalyst 3550-24 and 3550-24-DC: 48 dBa

Cisco Catalyst 3550-48 and 3550-24-FX: 46 dBa

Cisco Catalyst 3550-24 PWR: 47 dBa

Not intended for use on top of desktops or in open office environments

IEEE 802.1x

IEEE 802.1w

IEEE 802.1s

IEEE 802.3x full duplex on 10Base-T, 100Base-TX, and 1000Base-T ports

IEEE 802.1D Spanning-Tree Protocol

IEEE 802.1p CoS Prioritization

IEEE 802.1Q VLAN

IEEE 802.3ad

IEEE 802.3 10Base-T specification

IEEE 802.3u 100Base-TX specification

IEEE 802.3ab 1000Base-T specification

IEEE 802.3z 1000Base-X specification

1000Base-X (GBIC)

1000Base-SX

1000Base-LX/LH

1000Base-ZX1000Base-CWDM GBIC 1470nm

1000Base-CWDM GBIC 1490nm

1000Base-CWDM GBIC 1510nm

1000Base-CWDM GBIC 1530nm

1000Base-CWDM GBIC 1550nm

1000Base-CWDM GBIC 1570nm

1000Base-CWDM GBIC 1590nm

1000Base-CWDM GBIC 1610nm

RMON I and II standards

SNMPv1, SNMPv2c, SNMPv3

UL to UL 1950, Third Edition

c-UL to CAN/CSA 22.2 No. 950-95, Third Edition

TUV/GS to EN 60950 with Amendment A1-A4 and A11

CB to IEC 60950 with all country deviations

NOM to NOM-019-SCFI

CE Marking

FCC Part 15 Class A

EN 55022 Class A (CISPR 22 Class A)

VCCI Class A

AS/NZS 3548 Class A

BSMI

CE Marking