10/100/1000Base-T Copper Ports; Speed; Duplex Mode; Wiring Configuration - Allied Telesis AlliedWare Plus Installation Manual

10/100/1000Base-T Copper Ports

Speed

Duplex Mode

Wiring
Configuration
The copper ports on the switches are described in this section.
The ports can operate at 10, 100, or 1000 Mbps. The speeds may be set
manually using the management software or automatically with Auto-
Negotiation (IEEE 802.3u), the default setting.
Note
The ports must be set to Auto-Negotiation to function at 1000 Mbps
and are not compatible with devices that are not IEEE 802.3u
compliant.
The copper ports can operate in either half- or full-duplex mode. The
duplex mode of a port, like port speed, may be set manually using the
management software or automatically with Auto-Negotiation (IEEE
802.3u), the default setting.
The speed and duplex mode settings of a port may be set independently
of each other. For example, a port may be configured such that its speed
is set manually while its duplex mode is established through Auto-
Negotiation.
Note
A switch port should not use Auto-Negotiation to set its duplex mode
if it is connected to a network device that does not support Auto-
Negotiation for 10 or 100 Mbps operation and has a fixed duplex
mode of full-duplex. Otherwise, a duplex-mode mismatch may occur
in which a switch port and a network device operate at different
duplex modes. The duplex modes of switch ports that are connected
to network devices that do not support Auto-Negotiation should be
set manually through the management software.
The wiring configuration of a port operating at 10 or 100 Mbps can be MDI
or MDI-X. The wiring configurations of a switch port and a network device
connected with straight-through copper cabling have to be opposite, such
that one device is using MDI and the other MDI-X. For instance, a switch
port has to be set to MDI-X if it is connected to a network device set to
MDI.
You may set the wiring configurations of the ports manually or let the
switch configure them automatically with auto-MDI/MDI-X (IEEE 802.3ab-
compliant). This feature enables the switch to automatically negotiate with
network devices to establish their proper settings.
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