Installation guide

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Catalyst 3550 Multilayer Switch Hardware Installation Guide

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Chapter 3 Switch Installation

Powering the Switch and Connecting Devices

You can connect the Cisco RPS 675 (model PWR675-AC-RPS-N1) to these

switch models.

• Catalyst 3550-12T, 3550-12G, 3550-24, 3550-FX, 3550-24PWR, or 3550-48

switch. (The Cisco RPS 675 does not support the Catalyst 3550-24-DC

switch.)

Warning

Attach only the Cisco RPS (model PWR675-AC-RPS-N1) to the RPS receptacle.

Connecting to the 10/100 and 10/100/1000 Ports

Caution To prevent ESD damage, follow your normal board and component handling

procedures when connecting to the Ethernet ports.

Use the guidelines in Table 3-1 to select the correct cable for connecting the

switch 10/100 and 10/100/1000 ports to other devices. See the “Cable and Adapter

Specifications” section on page B-4 for cable-pinout descriptions.

The switch 10/100 and 10/100/1000 port default setting is autonegotiate. If the

attached device does not support autonegotiation, you can explicitly set the speed

and duplex parameters. After connecting the cable, the port LED turns green when

both the switch and the connected device have established a link.

Table 3-1 Recommended Ethernet Cables

Device Crossover Cable

1. 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5 cable. 10BASE-T

traffic can use Category 3 or Category 4 cable.

Straight-Through Cable

Switch to switch Yes No

Switch to hub Yes No

Switch to computer

or server

No Yes

Switch to router No Yes

Switch to IP phone No Yes