The negotiation auto command provides a mode option for configuring 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
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.
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 flaps
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 tengigabitethernet 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
(Configured) Dell#show interfaces configured
TenGigabitEthernet 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:
...
User
Information Both sides of the link must have auto-negotiation enabled or disabled for the link
to come up.
694 Interfaces