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Follow these steps:
1. Open your browser, and go to http://www.cisco.com/.
2. Click Technical Support.
3. Click Product Support > Switches > Catalyst LAN and ATM Switches > 3550 Series Switches >
Troubleshooting.
4. Click the subject that addresses the problem that you are experiencing.
For More Information
For more information about the switch, refer to these documents on Cisco.com:
• Catalyst 3550 Multilayer Switch Hardware Installation Guide (not orderable but available on
Cisco.com). This guide provides complete hardware descriptions and detailed installation
procedures.
• Regulatory Compliance and Safety Information for the Catalyst 3550 Multilayer Switch (order
number DOC-7816655). This guide contains agency approvals, compliance information, and
translated warning statements.
• Catalyst 3550 Multilayer Switch Software Configuration Guide (order number DOC-7816610=).
This guide provides a product overview and detailed descriptions and procedures of the switch
software features.
• Catalyst 3550 Multilayer Switch Command Reference (order number DOC-7816611=). This
reference provides detailed descriptions of the Cisco IOS commands specifically created or
modified for the switch.
• Catalyst 3550 Multilayer Switch System Message Guide (order number DOC-7816681=). This
guide provides descriptions of the system messages specifically created or modified for the switch.