Reference Guide

Interfaces | 627
Example
(Master/Slave)
FTOS(conf)# int gi 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)#
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.
Example
(Display Master/
Slave setting)
FTOS#show interfaces configured
GigabitEthernet 13/18 is up, line protocol is up
Hardware is Force10Eth, address is 00:01:e8:05:f7:fc
Current address is 00:01:e8:05:f7:fc
Interface index is 474791997
Internet address is 1.1.1.1/24
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed 1000 Mbit, Mode full duplex, Master
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interfaces" counters 00:12:42
Queueing strategy: fifo
Input Statistics:
...
Both sides of the link must have auto-negotiation enabled or disabled for the link to come up.
The following table details the possible speed and auto-negotiation combinations for a line
between two 10/100/1000 Base-T Ethernet interfaces.
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.