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.
NOTE:
When the port is provisioned as fiber and a copper cable is inserted, it is not detected by the device and hence no
syslog message is displayed.
If SFP is present when the port is being provisioned as copper, the system displays a syslog message.
426
Interfaces