Cisco 3030 - Manual (Page 52)

3-4
Cisco Catalyst Blade Switch 3030 Hardware Installation Guide
OL-8389-01
Chapter 3 Troubleshooting
Diagnosing Problems
No connectivity Incorrect or bad cable
These are results of no link at both
ends:
• A crossover cable was used
when a straight-through was
required, or the reverse.
• The cable is wired incorrectly.
• A crossover or straight-through
cable is wired incorrectly.
• STP checking for possible
loops.
• For the correct pinouts and
the proper application of
crossover or
straight-through cables, see
the
“Two Twisted-Pair
Cable Pinouts” section on
page B-4
.
• Replace with a tested good
cable.
• For 1000BASE-T
connections, be sure to use
a twisted four-pair,
Category 5 cable.
• Wait 30 seconds for the port
LED to turn green.
Unreadable characters on the
management console Incorrect baud rate. Reset the emulation software to
9600 baud.
Amber system LED Fatal POST error detected. Contact Cisco Systems.
The switch port is placed in
error-disabled state after SFP
module is inserted Bad or non-Cisco-approved SFP
module. Remove the SFP module from
the switch, and replace it with a
Cisco-approved module. Use the
errdisable recovery cause
gbic-invalid global
configuration command to
verify the port status, and enter a
time interval to recover from the
error-disable state.
Refer to the switch command
reference guide for information
on the errdisable recovery
command.
Table 3-1 Common Problems and Their Solutions (continued)
Symptom Possible Cause Resolution