3Com SuperStack II Switch 3000 10/100 User Manual page 56

4-14 C 4: M
HAPTER ANAGING THE
CAUTION: The Duplex Mode of a link is not
detected if the port on the other end of the link
is not auto-negotiating. In this case, the Switch
3000 10/100 port is set to operate in half duplex.
If the port on the other end of the link is set to
operate in full duplex, this creates a large number
of late events on the link. Therefore:
If you want the link to operate in full duplex,
set the Switch 3000 10/100 port to operate
in full duplex
If you want the link to operate in half duplex,
set the port on the other end of the link to
half duplex
10Mbps Half Duplex — The port is set to
10Mbps and its Duplex Mode is set to half
duplex.
10Mbps Full Duplex — The port is set to 10Mbps
and it's Duplex Mode is set to full duplex.
100Mbps Half Duplex — The port is set to
100Mbps and its Duplex Mode is set to half
duplex.
100Mbps Full Duplex — The port is set to
100Mbps and its Duplex Mode is set to full
duplex.
S 3000 10/100
WITCH
Plug-in Module ports are not auto-negotiating. If
the port is a Plug-in Module port, the Speed/Duplex
Mode field is replaced by a Duplex Mode field with
the following settings:
Half Duplex
Full Duplex
Unit Default — The Duplex Mode of the port is
defined by the Speed/Duplex Mode field in the
Unit Setup screen. This is the default setting.
The settings of the Speed/Duplex Mode field in
the Unit Setup screen affect the behavior of the
Plug-in Module port differently to the fixed
10BASE-T / 100BASE-TX ports. These differences
are described in
Table 4-1 Differences in Speed/Duplex Mode behavior
Setting of Behavior of fixed
Speed/Duplex ports
Mode field in Unit
Setup Screen
Auto Negotiated Auto-negotiated
10Mbps Half Duplex 10Mbps Half Duplex
100Mbps Half Duplex 100Mbps Half Duplex 100Mbps Half Duplex
10Mbps Full Duplex 10Mbps Full Duplex
100Mbps Full Duplex 100Mbps Full Duplex
Table 4-1.
Behavior of Plug-in
Module ports
100Mbps Half Duplex
100Mbps Half Duplex
100Mbps Full Duplex
100Mbps Full Duplex