CLI Guide

You can display master/slave settings with the show interfaces command.
You can use the negotiation auto command to turn autonegotiation on or off only on fiber
interfaces operating at 1G speed.
If you use a 1 G SFP, disable autonegotiation on both peer ends. If you do not disable autonegotiation, the
link does not come up.
Example
(Master/Slave)
DellEMC(conf)# interface tengigabitethernet 1/1
DellEMC(conf-if)# neg auto
DellEMC(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
DellEMC(conf-if-autoneg)# mode ?
forced-master Force port to master mode
forced-slave Force port to slave mode
DellEMC(conf-if-autoneg)#
Example
(Configured)
DellEMC# show interfaces configured
TenGigabitEthernet 1/18 is up, line protocol is up
Hardware is DellEMCEth, 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.
The following details the possible speed and auto-negotiation combinations for a line between two
10/100/1000 Base-T Ethernet interfaces.
Port 0
● auto-negotiation enabled* speed 1000 or auto
● auto-negotiation enabled speed 100
● auto-negotiation disabled speed 100
● auto-negotiation disabled speed 100
● auto-negotiation enabled* speed 1000 or auto
Port 1
● auto-negotiation enabled* speed 1000 or auto
● auto-negotiation enabled speed 100
● auto-negotiation disabled speed 100
● auto-negotiation enabled speed 100
● auto-negotiation disabled speed 100
Link Status Between Port 1 and Port 2
● Up at 1000 Mb/s
● Up at 100 Mb/s
● Up at 100 Mb/s
● Down
● Down
* You cannot disable auto-negotiation when the speed is set to 1000 or auto.
Interfaces
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