Reference Guide

Interfaces | 137
negotiation auto
Enable auto-negotiation on an interface.
Syntax
negotiation auto
To disable auto-negotiation, enter no negotiation auto.
Defaults
Enabled
Command Modes
INTERFACE
Command
History
Usage
Information
The no negotiation auto command is only available if you first manually set the speed of a port to
10Mbits or 100Mbits.
The negotiation auto command provides a mode option for configuring an individual port to
forced-master/forced slave once auto-negotiation is enabled
Figure 11-13. negotiation auto Master/Slave Example
If the mode option is not used, the default setting is slave. If you do not configure forced-master or
forced slave on a port, the port negotiates to either a master or a slave state. Port status is one of the
following:
• Forced-master
• Force-slave
• Master
• Slave
• Auto-neg Error—typically indicates that both ends of the node are configured with forced-master
or forced-slave.
You can display master/slave settings with the show interfaces command.
Version 8.3.17.0 Supported on M I/O Aggregator
Caution: Ensure that one end of your node is configured as forced-master and one is
configured as forced-slave. If both are configured the same (that is forced-master or
forced-slave), the show interfaces command will flap between an auto-neg-error and
forced-master/slave states.
FTOS(conf)# int tengig 0/0
FTOS(conf-if)#neg auto
FTOS(conf-if-autoneg)# ?
end Exit from configuration mode
exit Exit from autoneg configuration mode
mode Specify autoneg mode
no Negate a command or set its defaults
show Show autoneg configuration information
FTOS(conf-if-autoneg)#mode ?
forced-master Force port to master mode
forced-slave Force port to slave mode
FTOS(conf-if-autoneg)#