Manual override
If you require control over the MDI/MDI-X feature, you can set the switch to either of these non-default modes:
• Manual MDI
• Manual MDI-X
The table below shows the cabling requirements for the MDI/MDI-X settings.
Table 5: Cable types for auto and manual MDI/MDI-X settings
Setting MDI/MDI-X device type
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 AutoMDIX features apply only to copper port switches using twisted-pair copper Ethernet cables.
Configuring auto-MDIX (CLI)
The auto-MDIX features apply only to copper port switches using twisted-pair copper Ethernet cables. For
information about auto-MDIX, see Configuring auto-MDIX on page 88.
Syntax:
interface <port-list> mdix-mode < {auto-mdix | mdi | mdix>}
auto-mdix
The automatic,default setting. This configures the port for automatic detection of the cable
(either straight-through or crossover).
mdi
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.
mdix
The manual mode setting that configures the port for connecting to either a switch, hub, or
other MDI-X device with a crossover cable, or to a PC or other MDI device with a straight-
through cable.
Syntax:
show interfaces config
Lists the current per-port Auto/MDI/MDI-X configuration.
Syntax:
show interfaces brief
Chapter 3 Port Status and Configuration 89
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