Cisco 2955 Installation Guide download pdf (Page 181)

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Catalyst 2955 Hardware Installation Guide

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Chapter 4 Installation in a Hazardous Environment

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

The 10/100 ports on the Catalyst 2955 configure themselves to operate at the

speed and duplex settings of attached devices.They operate at 10 or 100 Mbps in

half- or full-duplex mode. If the attached devices do not support autonegotiation,

you can set the speed and duplex parameters.

The 10/100/1000 ports configure themselves to operate at the speed setting of

attached devices. These ports on the Catalyst 2955T-12 operate at either 10 or 100

Mbps in either full- or half-duplex mode or at 1000 Mbps in full-duplex mode. If

the attached devices do not support autonegotiation, you can set the speed

parameter.

Connecting devices that do not autonegotiate or devices with manually set speed

and duplex parameters can reduce performance or result in link failures between

the devices. To maximize performance, choose one of these methods for

configuring the ports:

• Let the ports autonegotiate both speed and duplex for 10/100 ports and speed

for 10/100/1000 ports.

• Set the speed and duplex parameters on both ends of the connection.

Warning

Do not connect or disconnect cables to the ports while power is applied to the

switch or any device on the network because an electrical arc can occur. This

could cause an explosion in hazardous location installations. Be sure that

power is removed from the switch and cannot be accidentally be turned on, or

verify that the area is nonhazardous before proceeding.

Statement 1070

Caution Proper ESD protection is required whenever you handle Cisco equipment.

Installation and maintenance personnel should be properly grounded using

ground straps to eliminate the risk of ESD damage to the switch.

Do not touch connectors or pins on component boards. Do not touch circuit

components inside the switch. When not in use, store the equipment in

appropriate static-safe packaging.

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Cisco 2955 Installation Guide Page 181