Allied Telesis AT-S63 - Manual (Page 76)

Chapter 6: Port Parameters
76 Section I: Basic Features
Disabled - The port does not receive or forward packets.
Speed and Duplex
You use this selection to configure a port for autonegotiation or to
manually set a port’s speed and duplex mode.
If you select Auto-Negotiate for autonegotiation, which is the
default setting, the switch sets both speed and duplex mode for
the port automatically.
Note the following about the operation of autonegotiation on the
switch port:
❑ In order for a switch port to successfully autonegotiate its duplex
mode with an end node, the end node should also be using
autonegotiation. Otherwise, a duplex mode mismatch can occur.
A switch port using autonegotiation defaults to half-duplex if it
detects that the end node is not using autonegotiation. This
results in a mismatch if the end node is operating at a fixed duplex
mode of full-duplex.
To avoid this problem, when connecting an end node with a fixed
duplex mode of full-duplex to a switch port, you should disable
autonegotiation on the port and set the port’s speed and duplex
mode manually.
❑ If you disable autonegotiation on a port, the auto-MDI/MDI-X
feature on a port is also disabled, and the port defaults to the MDI-
X configuration. Consequently, if you disable autonegotiation and
set a port’s speed and duplex mode manually, you might also
need to set the port’s MDI/MDI-X setting as well.
Auto-Negotiate: The port autonegotiates both speed
(10/100/1000 Mbps) and duplex mode. This is the default.
The other possible settings are:
10Mbps - Half Duplex
10Mbps - Full Duplex
100Mbps - Half Duplex
100Mbps - Full Duplex
Note
When a transceiver is inserted into an uplink slot and a link is
established, that slot becomes a primary uplink port and the
corresponding backup port, 23R or 24R, automatically transitions to
redundant uplink status. The speed and duplex mode of the