Administrator Guide

• 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.
NOTE: In S3100 series, the negotiation auto command is not available on the combo ports in
the hybrid mode. You need to provision the combo port as copper or fiber medium using the
combo-port-type command. See combo-port-type.
You can display master/slave settings with the show interfaces command.
Example (Master/
Slave)
DellEMC(conf)# interface gigabitethernet 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
GigabitEthernet 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
Interfaces 619