Installation guide

3-5
Catalyst 3500 Series XL Hardware Installation Guide
78-6456-03
Chapter 3 Troubleshooting
Diagnosing Problems
No connectivity. Incorrect or bad cable.
The following are indicated by no
linkatbothends:
• A crossover cable was used
when a straight-through was
required, or vice-versa.
• The cable is wired incorrectly.
• STP checking for possible
loops.
• For the correct pinouts and
the proper application of
crossover vs.
straight-through cables, see
the “Crossover and
Straight-Through Cable
Pinouts” section on
page B-4.
• Replace with a tested good
cable.
• Wait 30 seconds for LED to
turn green.
Unreadable characters on the
management console.
Incorrect baud rate. Reset the emulation software to
9600 baud.
System LED is amber on the
Catalyst 3508, 3512, or 3524 XL
switch.
Nonfatal or fatal POST error
detected.
Use the show POST command
to see which POST test failed.
Table 3-2 Common Problems and Their Solutions (continued)
Symptom Possible Cause Resolution