3Com 1100 - Manual (Page 221)

Solving Other Problems 221
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 see network problems and a Packet LED is lit continuously due
to constant collisions. You are using PACE-equipped devices and PACE
is enabled at both ends of the link. PACE must only be enabled at one
end of the Switch–device link. Disabling PACE for a port is described in
“Configuring a Port” on page 59 .
You have added the Switch 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 Switch ports via a hub, 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 hub. Disabling half duplex flow control is
described in
“Configuring a Port” on page 59 .
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 Switch 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
Switch to operate in full duplex. For more information, see
“Configuring a Port” on page 59 .
■
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.