Users Guide

Version Description
8.3.19.0 Introduced on the S4820T.
8.3.11.0 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series ExaScale.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
pre-6.2.1.0 Introduced on the E-Series.
Usage Information
This command is supported on C-Series, S-Series, and E-Series (TeraScale and ExaScale) 10/100/1000
Base-T Ethernet interfaces.
The no negotiation auto command is only available if you rst manually set the speed of a port to
10Mbits or 100Mbits.
The negotiation auto command provides a mode option for conguring an individual port to forced-
master/forced slave after you enable auto-negotiation.
NOTE: The mode option is not available on non-10/100/1000 Base-T Ethernet line cards.
If you do not use the mode option, the default setting is slave. If you do not congure 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 congured with forced-master or
forced-slave.
CAUTION: Ensure that one end of your node is congured as forced-master and one is congured
as forced-slave. If both are congured the same (that is, forced-master or forced-slave), the show
interfaces command aps between an auto-neg-error and forced-master/slave states.
You can display master/slave settings with the show interfaces command.
Example (Master/
Slave)
Dell(conf)# interface gigabitethernet 1/1
Dell(conf-if)#neg auto
Dell(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
Dell(conf-if-autoneg)#mode ?
forced-master Force port to master mode
forced-slave Force port to slave mode
Dell(conf-if-autoneg)#
Example
(Congured)
Dell#show interfaces configured
GigabitEthernet 13/18 is up, line protocol is up
Hardware is Force10Eth, address is 00:01:e8:05:f7:fc
Interfaces
649