Setup Guide

The local interface and the directly connected remote interface must have the same setting, and auto-negotiation is the easiest way to
accomplish that, as long as the remote interface is capable of auto-negotiation.
NOTE: As a best practice, Dell Networking recommends keeping auto-negotiation enabled. Only disable auto-negotiation on
switch ports that attach to devices not capable of supporting negotiation or where connectivity issues arise from interoperability
issues.
For 10/100/1000 Ethernet interfaces, the negotiation auto command is tied to the speed command. Auto-negotiation is always
enabled when the speed command is set to 1000 or auto.
Set Auto-Negotiation Options
The negotiation auto command provides a mode option for conguring an individual port to forced master/ forced slave once auto-
negotiation is enabled.
CAUTION: Ensure that only one end of the node is congured as forced-master and the other is congured as forced-slave. If
both are congured the same (that is, both as forced-master or both as forced-slave), the show interface command aps
between an auto-neg-error and forced-master/slave states.
Example of the
negotiation auto Command
Dell(conf)# int tengig 0/0
Dell(conf-if-te-0/1)#neg auto
Dell(conf-if-te-0/1)# ?
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-te-0/1)#mode ?
forced-master Force port to master mode
forced-slave Force port to slave mode
Dell(conf-if-te-0/1)#
For details about the speed and negotiation auto commands, refer to the Interfaces chapter of the Dell Networking OS Command
Reference Guide
.
Provisioning Combo Ports
The device has two combo ports of 1G SFP. By default, the combo ports are in Hybrid mode. You can provision the combo ports to act as a
copper or ber medium.
The speed and negotiation auto commands are not available on the combo ports in the Hybrid mode. To apply these commands on
combo ports, provision the ports as individual medium. You can use the
combo-port-type command to provision the combo ports as
copper or ber medium.
Dell(conf-if-pegi-2/0/48)# combo-port-type copper
Dell(conf-if-pegi-2/0/48)# combo-port-type fiber
When a port is provisioned as copper, you can congure all the supported speeds on a copper interface (10 M, 100 M, 1 G). Whenever
there is a change in provisioning, all the existing congurations on the port are deleted. This ensures that stale congurations, that are not
applicable for a specic medium, are not present on the port. When the congurations are deleted, a conrmation message is displayed and
you can choose whether to delete them or not.
When combo ports are in Auto or Hybrid mode, the system assumes the presence of SFP as ber medium and switches to ber mode.
When an empty SFP is inserted with a copper cable present, a few copper-only commands are not accessible and the output of show
commands might provide incorrect information. It is recommended not to have SFP inserted when copper cable is used as active medium.
480
Interfaces