Administrator Guide

Adjusting the Keepalive Timer
To change the time interval between keepalive messages on the interfaces, use the keepalive command. The interface sends
keepalive messages to itself to test network connectivity on the interface.
To change the default time interval between keepalive messages, use the following command.
● Change the default interval between keepalive messages.
INTERFACE mode
keepalive [seconds]
● View the new setting.
INTERFACE mode
show config
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-gi-1/23)# combo-port-type copper
Dell(conf-if-gi-1/23)# 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 28. 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.
NOTE:
When the port is provisioned as fiber, the presence of copper cable is not detected by the device and hence no
syslog message is displayed.
Interfaces 351