212CHAPTER 7: ETHERNET PORTS

ethernet autoNegotiation

3500

9000

9400

3900

9300

Enables or disables autonegotiation of port attributes such as duplex mode and port speed on ports that support autonegotiation.

Valid Minimum Abbreviation

e a

Important Considerations

You can use this command to configure the same setting on multiple ports simultaneously. When you specify multiple port numbers, the system prompts you to choose the setting and then applies it to all of the ports.

When you enable autonegotiation, the system ignores your requested portMode information for 10/100BASE-TX ports and your requested flowControl information for 1000BASE-SX ports. When you disable autonegotiation, the system recognizes the requested portMode values for ports that have portMode options and the requested flowControl values for 1000BASE-SX ports. (100BASE-FX ports and backplane ports do not support autonegotiation.)

Therefore, it is extremely important that you understand how to implement flowcontrol and portMode in your network. See the Implementation Guide for your system for more information.

Options

Prompt

Description

Possible Values [Default]

Port

Port numbers for which you

 

want to enable or disable

 

autonegotiation

Autonegotiation Whether to enable or

setting disable autonegotiation on each of the ports that you selected

A single port

A range of ports

all

? (to display a port summary)

enable

enable

disable

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3Com 3500 manual Want to enable or disable, Autonegotiation, Disable