Troubleshooting Guide

Xircom CreditCard
Ethernet 10/100
CE3B-100
Not negotiating
or operating
correctly at 100
Mbps, full-
duplex.
Full-duplex
operation is
only supported
at 10 Mbps.
Full-duplex is
not supported
at 100 Mbps.
The LineMode
keyword has
no effect on
performance at
100 Mbps. If
the LineSpeed
keyword is set
to 100 Mbps
and the
LineMode
keyword is set
to full-duplex,
the LineMode
keyword is
ignored. Full-
duplex at 10
Mbps is only
available when
the adapter is
connected to a
full-duplex-
capable switch
or hub.
Do not operate this NIC
at 100 Mbps, full-
duplex.
Xircom CreditCard
Ethernet 10/100
CE3B-100
Not negotiating
10 Mbps full-
duplex.
The CE3 and,
in some cases,
the CE3B are
not capable of
negotiating to
10 Mbps, full-
duplex mode.
On these adapters, in
order to operate in full-
duplex mode, the
LineSpeed keyword
must be set to 10
Mbps, and the
LineMode keyword
must be set to full-
duplex. The cable type
keyword can be set to
Auto Detect or
10BASE-T/100BaseTX.
The related port on the
attached hub or switch
must also be set to
10Mbps, full-duplex.
Xircom RealPort2
CardBus Ethernet
10/100 Adapter
(R2BE/RBE/CBE)
Models
Extremely slow
performance
when operating
at 10 Mbps.
Certain 10/100
switches
implement
automatic
correction for
polarity-
reversed
cables that are
not completely
compatible with
the same
correction
provided by the
CBE/RBE. If
the network
speed is forced
to 10 Mbps,
severe
throughput
problems can
be
experienced.
In order to resolve this
problem, a new Auto
Polarity keyword is
added in the adapter
advanced properties in
driver version 3.01. If
needed, the default
setting of ON, which
means that the card
compensates for
reversed cables, can
be set to OFF to disable
polarity correction. This
restores normal
throughput.
Initialization
delay. Certain
switches and
routers are
unable to
immediately
forward
network traffic
when a
network