Port Status and Basic Configuration
Viewing Port Status and Configuring Port Parameters
Auto-MDIX was developed for auto-negotiating devices, and was shared with
the IEEE for the development of the IEEE 802.3ab standard. Auto-MDIX and
the IEEE 802.3ab Auto MDI/MID-X feature are completely compatible. Addi-
tionally, Auto-MDIX supports operation in forced speed and duplex modes.
If you want more information on this subject please refer to the IEEE 802.3ab
Standard Reference.
For more information on MDI-X, refer to the appendix titled “Switch Ports and
Network Cables” in the Installation and Getting Started Guide for your
switch.
Manual Auto-MDIX Override
If you require control over the MDI/MDI-X feature you can set the switch to
either of two non-default modes:
■ Manual MDI
■ Manual MDI-X
Table 10-1 shows the cabling requirements for the MDI/MDI-X settings.
Table 10-1. Cable Types for Auto and Manual MDI/MDI-X Settings
MDI/MDI-X Device Type
Setting PC or Other MDI Device Type Switch, Hub, or Other MDI-X Device
Manual MDI Crossover Cable Straight-Through Cable
Manual MDI-X Straight-Through Cable Crossover Cable
Auto-MDI-X
(The Default)
Either Crossover or Straight-Through Cable
The Auto-MDIX features apply only to copper port switches using twisted-pair
copper Ethernet cables.
Syntax: interface < port-list > mdix-mode < automdix | mdi | mdix >
automdix is the automatic, default setting. This configures the
port for automatic detection of the cable (either straight-through
or crossover).
mdi is the manual mode setting that configures the port for
connecting to either a PC or other MDI device with a crossover
cable, or to a switch, hub, or other MDI-X device with a straight-
through cable.
10-13
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