3Com WX3000 operation manual Configuring Port Auto-Negotiation Speed

To do…	Use the command…		Remarks
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type	—
	interface-number
		By default, the port is enabled.
Enable the Ethernet port	undo shutdown	Use the shutdown command to
			disable the port.
Set the description of the	description text	By default, no description is defined
Ethernet port		for an Ethernet port.
Set the duplex mode of the	duplex { auto full half }		The port defaults to auto
Ethernet port			(autonegotiation) mode.
Set the rate of the Ethernet port	speed { 10 100 1000		By default, the speed of the port is
	auto }		set to auto mode.
Set the MDI attribute of the	mdi { across auto		Be default, the MDI attribute of the
Ethernet port	normal }		port is set to auto mode.
Allow jumbo frames that are not		Optional
		By default, jumbo frames that are
larger than 4096 bytes to pass	jumboframe enable
		not larger than 4096 bytes are
through the Ethernet port
		allowed to pass through the port.

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For a combo port, only after the optical interface has been configured with the shutdown command can the electrical interface be used, and vice versa.

The speed and mdi commands are not available on the combo port.

The mdi command is not available on the Ethernet ports of the expansion interface card.

Configuring Port Auto-Negotiation Speed

You can configure an auto-negotiation speed for a port by using the speed auto command.

Take a 10/100/1000 Mbps port as an example.

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If you expect that 10 Mbps is the only available auto-negotiation speed of the port, you just need to configure speed auto 10.

If you expect that 10 Mbps and 100 Mbps are the available auto-negotiation speeds of the port, you just need to configure speed auto 10 100.

If you expect that 10 Mbps and 1000 Mbps are the available auto-negotiation speeds of the port, you just need to configure speed auto 10 1000.

Follow these steps to configure auto-negotiation speeds for a port:

To do…		Use the command…	Remarks
Enter system view		system-view	—
Enter Ethernet interface view		interface interface-type	—
		interface-number
	1-4