IBM 8271 Nways Ethernet LAN Switch, User Manual

Page: 149 / 210

Solving Other Problems 8-9
An error occurs when the utility attempts to transfer the file.
There could be a number of reasons for this:
■
The null modem cable has become disconnected from the Switch or
the PC during the file transfer. Reconnect the cable and start again.
■
Power to the Switch has been disrupted during the file transfer.
Check the power connection to the Switch and start again.
■
An incorrect file is being specified and transferred to the Switch.
Check the filenames and start again.
Solving Other
Problems
You have added the stack to an already busy network, and
response times and traffic levels have increased.
You may have
added a group of users to one of the stack ports via a repeater, and
not disabled half duplex flow control for the port. Disable half duplex
flow control for all ports that are operating in half duplex and are
connected to multiple devices using a repeater. Disabling half duplex
flow control is described in “Configuring a Port on the Switch” on
page 4-16.
You have enabled auto-negotiation for a 10BASE-T/100BASE-TX
port, and you are seeing a large number of late events on the
port.
The port connected to the stack is not auto-negotiating and is
operating in full duplex:
■
If you want the link to operate in full duplex, set the port on the
stack to operate in full duplex. For more information, see
“Configuring a Port on the Switch” on page 4-16.
■
If you want the link to operate in half duplex, set the port on the
other end of the link to operate in half duplex. For more
information, see the documentation supplied with the remote
device.
F24user.bk Page 9 Wednesday, July 15, 1998 4:27 PM