Switch Self-Reset; Ports 1/2 And 2/2 Do Not Function; Packet Loss - Cisco Catalyst 4500e Series Installation Manual

Chapter 5 Troubleshooting
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If a software upgrade is performed on both the active and standby supervisor engines, verify that both
supervisor engines are running the same new software image. If the software images are not the same,
upgrade the software image. Use the procedure in the software configuration guide for your release.
If the standby supervisor engine still does not come on line, create a service request with Cisco Technical
Support. Use the log of the switch output that you collected from the previous troubleshooting steps.

Switch Self-reset

If the switch has reset or rebooted on its own, verify that the power source for the switch did not fail. If
you use an uninterruptable power supply (UPS), make sure that the UPS does not have any problems.
The switch might have had a software crash. Enter the more crashinfo:data command to display the
crash information including date and time of the last time that the switch crashed. To display the standby
supervisor engine crash data, enter the more slavecrashinfo:data command. The crash data are not
present if the switch has never crashed.
Switch# more crashinfo:data
Current time: 04/21/2000 19:58:10
Last crash: 04/21/2000 03:58:56
!--- Output suppressed.
If the output indicates a software crash at the time that you suspect that the switch rebooted, the problem
can be something other than a hardware failure. Contact Cisco Technical Support with the output of these
commands:
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If you are still unable to determine the problem, contact Cisco Technical Support.

Ports 1/2 and 2/2 Do Not Function

If you have dual supervisor engines in a Catalyst 4507R or a Catalyst 4510R chassis and your ports 1/2
and 2/2 do not function, the system is functioning as designed, which is to have two uplinks operational
at all times. The dual uplinks must also work when only one supervisor engine is present. This means
that if only one supervisor engine is present and is in slot 1, both ports 1/1 and 1/2 are functional. Also,
if only one supervisor engine is present and is in slot 2, ports 2/1 and 2/2 are functional. When dual
supervisor engines are present, only ports 1/1 and 2/1 are functional and 1/2 and 2/2 are not functional.
For more information, refer to the redundancy chapter in the software configuration guide.

Packet Loss

If your system exhibits partial or full loss of network connectivity or packet loss, perform basic
troubleshooting procedures to eliminate the common causes. The common causes include:
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OL-13972-01
Configuration register
Calendar
VLAN database
show tech-support
show logging
more crashinfo:data
Bad cabling
Troubleshooting Supervisor Engines
Catalyst 4500 E-Series Switches Installation Guide
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