3Com SuperStack II Switch 3000 10/100 User Manual page 127

Using the Switch C-5
You have set the speed and Duplex Mode of a
port to Auto Negotiated, and you are seeing a
large number of late events on the port (refer
to "Port Error Analysis" on page 6-7):
The port connected to the Switch 3000 10/100
port is not auto-negotiating and is operating in full
duplex.
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 operate in
half duplex.
Figure C-1 Network configuration that results in loss of contact