Cisco Catalyst 4000 series Hardware Troubleshoot page 5

Supervisor Crashes
These problems can occur when the switch has reset, continually resets, or is down completely.
Symptom Description
This section discusses symptoms, troubleshooting procedures, and commands for Catalyst 4000 family
switches. This section assumes you are able to identify your switch chassis, supervisor engine, modules, and
feature cards, and that you understand the system specifications, cabling, power, and software requirements as
described for Cisco Catalyst 4500 Series Switches Install and Upgrade Guides.
If you have not determined what your primary symptom is, see the General Problem Solving Model section of
this document and apply the steps to your problem.
Connectivity Problems and Steps to Resolve Them
This section covers common connectivity issues that the customer can encounter with the Catalyst 4000.
These commands are supported by the Output Interpreter tool for CatOS and can be used to assist in
troubleshooting switch port problems:
•
show version
•
show module
•
show system
•
show port
•
show mac
•
show counters
•
show cdp neighbors detail
If you have the output of the supported commands from your Cisco device, you can use the Output Interpreter
(registered customers only) to display potential issues and fixes. In order to use Output Interpreter (registered
customers only) , you must be a registered user, be logged in, and have JavaScript enabled.
Can not console/Telnet into the supervisor
Both of these problems are covered in the Catalyst Troubleshooting Tips document that is mentioned earlier.
•
Not able to console
1. Verify that the power switch is in the ON position (|) and the system OK LED is ON.
2. Connect the cable directly to the console port and not through a patch panel.
3. Verify that the correct cabling and hardware is used to connect to your particular supervisor
engine. Refer to the Connecting a Terminal to the Console Port on Catalyst Switches
document for more information.
•
Not able to Telnet
1. Complete the steps in thedetailed procedure described in Catalyst Troubleshooting Tips. If it
is determined that the sc0 management interface is not configured or not configured correctly,
refer to Configuring an IP Address on Catalyst Switches for more information.
2. Attempt to Telnet from a PC directly connected to the switch in the same VLAN as the sc0
interface in order to eliminate any routing issues.
3. Gain console access to the switch and make sure the supervisor is not in boot> or rommon>.
If the switch is in one of these modes, you need to complete the steps in the recovery
procedures. Refer to Recovering Catalyst 4000 and Catalyst 5000 Switches from Corrupted or