60 Rockwell Automation Publication 1783-UM003G-EN-P - December 2012
Chapter 3 Manage the Switch via the Device Manager Web Interface
Speed The operating speed of the switch port. Choose the speed from the pull-down menu. You can choose Auto (autonegotiation) if the
connected device can negotiate the link speed with the switch port. The default is Auto.
We recommend that you use the default so that the speed setting on the switch port automatically matches the setting on the
connected device. Change the switch port speed if the connected device requires a specific speed.
An example of when to change this setting is during troubleshooting. If you are troubleshooting a connectivity problem, you can
change this setting to see if the switch port and connected device have a speed mismatch.
On Gigabit Ethernet ports the speed setting can be set only to auto.
Duplex The Duplex mode of the switch port. Choose the Duplex mode from the pull-down menu.
Choose one of the following options:
• Auto (autonegotiation) if the connected device can negotiate with the switch.
• Full (Full-duplex) if both devices can send data at the same time.
• Half (half duplex) if one or both devices cannot send data at the same time.
The default is Auto.
On Gigabit Ethernet ports only, you cannot set the port to half duplex if the port speed is set to Auto.
We recommend that you use the default so that the duplex setting on the switch port automatically matches the setting on the
connected device. Change the Duplex mode on the switch port if the connected device requires a specific mode.
An example of when to change this setting is during troubleshooting. If you are troubleshooting a connectivity problem, you can
change this setting to verify if the switch port and connected device have a duplex mismatch.
Auto-MDIX Whether the automatic medium-dependent interface crossover (auto-MDIX) feature can automatically detect the required cable
connection type (straight-through or crossover) and configure the connection appropriately. The default is Enable.
• Uncheck the selection for a port to disable the feature on the port.
• To re-enable auto-MDIX, first set the Duplex mode and the speed to Auto.
This setting is not available on the SFP module ports.
Media Type The active port type (either the RJ45 port or the SFP module port) of a dual-purpose uplink port.
By default, the switch detects whether the RJ45 port or SFP module port of a dual-purpose port is connected and uses the port
accordingly. Only one port can be active at a time. If both ports are connected, the SFP module port has priority. You cannot
change the priority setting.
Choose one of the following selections from the pull-down menu:
• SFP if the SFP module port should be active.
If you select this option, the speed and duplex displays the current settings, and auto-MDIX displays N/A.
• RJ45 if the RJ-45 port should be active.
If you select this option, you can set the port speed, duplex, and auto-mdix values.
• Auto (autonegotiation) if either port can be active.
If you select this option, the speed and duplex is set to auto, and auto-MDIX displays N/A.
The default is Auto.
Port Settings
Setting Description
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