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HP PROCURVE 6208M-SX Installation And Getting Started Manual: Changing The Default Gigabit Negotiation Mode

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Changing the Default Gigabit Negotiation Mode

You can configure the default Gigabit negotiation mode to be one of the following:
Negotiate-full-auto – The port first tries to perform a handshake with the other port to exchange capability
information. If the other port does not respond to the handshake attempt, the port uses the manually
configured configuration information (or the defaults if an administrator has not set the information). This is
the default.
Auto-Gigabit – The port tries to perform a handshake with the other port to exchange capability information.
Negotiation-off – The port does not try to perform a handshake. Instead, the port uses configuration
information manually configured by an administrator.
Although the standard for 100Base-Tx ports provides an option for a negotiating port to link with a non-negotiating
port, the 802.3x standard for Gigabit ports does not provide this option. As a result, unless the ports at both ends
of a Gigabit Ethernet link use the same mode (either auto-Gigabit or negotiation-off), the ports cannot establish a
link. An administrator must intervene to manually configure one or both sides of the link to enable the ports to
establish the link.
The software provides a solution by changing the default negotiation behavior for Gigabit Ethernet ports. The new
default behavior allows a port to establish a link with another port whether the other port is configured for auto-
Gigabit or negotiation-off. By default, Gigabit Ethernet ports first attempt auto-Gigabit. If auto-Gigabit does not
succeed (typically because the port at the other end is not configured for auto-Gigabit), the port switches to
Changing the Negotiation Mode
You can change the negotiation mode globally and for individual ports. Use either of the following methods.
To change the mode globally, enter a command such as the following:
HP9300(config)# gig-default neg-off
This command changes the global setting to negotiation-off. The global setting applies to all Gigabit Ethernet
ports except those for which you set a different negotiation mode on the port level.
To change the mode for individual ports, enter commands such as the following:
HP9300(config)# int ethernet 4/1 to 4/4
HP9300(config-mif-4/1-4/4)# gig-default auto-gig
This command overrides the global setting and sets the negotiation mode to auto-Gigabit for ports 4/1 – 4/4.
Here is the syntax for globally changing the negotiation mode.
Syntax: gig-default neg-full-auto | auto-gig | neg-off
Here is the syntax for changing the negotiation mode on individual ports.
Syntax: gig-default neg-full-auto | auto-gig | neg-off
To change the global default:
Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
Select the Advance link to display the advanced System parameters panel.
Select one of the following values from the Gig Port Default field's pulldown menu:
Configuring Basic Features
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