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Foundry Switch and Router Installation and Configuration Guide
10 - 32
December 2000
Changing the 802.3x Gigabit Negotiation Mode
On Chassis devices, the globally configured Gigabit negotiation mode for 802.3x flow control is the default mode
for all Gigabit ports. You can override the globally configured default and set individual ports to 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 for Chassis devices (including the TurboIron/8).
•
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.
On Stackable devices, the default negotiation mode is negotiation-off but you can enable auto-Gigabit on
individual Gigabit ports. Negotiate-full-auto is not supported on Stackable devices.
USING THE CLI
To change the mode for individual ports on a Chassis device, enter commands such as the following:
BigIron(config)# int ethernet 4/1 to 4/4
BigIron(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.
The following syntax applies to Chassis devices.
Syntax:
gig-default neg-full-auto | auto-gig | neg-off
To change a Gigabit port on a Stackable device to auto-Gigabit, enter commands such as the following:
BigIron(config)# int ethernet 1/4
BigIron(config-if-1/4)# auto-gig
The following syntax applies to Stackable devices.
Syntax:
[no] auto-gig
USING THE WEB MANAGEMENT INTERFACE
To override the global 802.3x negotiation mode for an Gigabit individual port on a Chassis device:
1.
Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2.
Click on the plus sign next to Configure in the tree view to display the configuration options.
3.
Select the Port link to display the Port table.
4.
Click on the Modify button next to the row of information for the port you want to reconfigure.
5.
Select one of the following values from the Gig Port Default field’s pulldown menu:
•
Default – The port uses the negotiation mode that was set at the global level.
•
Neg-off – The port does not try to perform a handshake. Instead, the port uses configuration information
manually configured by an administrator.
•
Auto-Gig – The port tries to perform a handshake with the other port to exchange capability information.
•
Neg-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).
6.
Click Apply to save the changes to the device’s running-config file.
7.
Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device’s flash memory.
Summary of Contents for Switch and Router
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