Installation guide

Page 4-5
Diagnostics
Types of Errors
The types of errors are defined as follows:
Error Type/Cause Solution (Options or Steps)
Very Long Events (MJLP)
❏ Very Long events cause the
repeater to enter MAU Jab-
ber lockout Protection
(MJLP).
1
Use the Hub Statistics win-
dow to determine which
port is the cause.
2
Disable the port, replace
the controller card, and
enable the port.
3
If that does not remedy the
problem, test the wiring.
❏ They do not occur on a
healthy network.
❏ Very long events are usually
caused by a bad controller
card or bad wiring.
Frame Check Sequence Errors
❏ Frame Check Sequence
Errors (FCS) Errors, Align-
ment errors, and short
events are normally caused
by noise picked up by the
wiring.
❏ Test the wiring. If it runs
near power cables, electri-
cal equipment, and so on, it
may need to be rerouted or
replaced.
Alignment Errors
❏ (See Frame Check Sequence Errors)
Short Events
❏ (See Frame Check Sequence Errors)