Administrator Guide

Set Auto-Negotiation Options
The negotiation auto command provides a mode option for configuring an individual port to forced master/ forced slave
once auto-negotiation is enabled.
CAUTION: Ensure that only one end of the node is configured as forced-master and the other is configured as
forced-slave. If both are configured the same (that is, both as forced-master or both as forced-slave), the show
interface command flaps 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 fiber 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 fiber 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 configure all the supported speeds on a copper interface (10 M, 100 M, 1 G).
Whenever there is a change in provisioning, all the existing configurations on the port are deleted. This ensures that stale
configurations, that are not applicable for a specific medium, are not present on the port. When the configurations are deleted, a
confirmation 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 fiber medium and switches to fiber
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.
The following table describes how the speed and negotiation auto commands work with different modes of a combo
port:
Table 40. Behavior on Combo Ports
Mode Behavior of speed Behavior of negotiation auto
Auto/Hybrid Cannot be configured and an error is
displayed.
Cannot be configured and no error is
displayed.
Copper Can be configured. Can be configured.
Fiber Cannot be configured. Cannot be configured.
When SFP is inserted on copper-provisioned combo port, the system displays a syslog message.
Interfaces
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