Cisco IOS Release 12.1

• Cisco IOS Release 12.1 Master Indexes
  Online links to topics and commands documented in the Cisco IOS Release 12.1 Configuration Guides and Command References

• Cisco IOS Release 12.1 Configuration Guides and Command References
  Documentation for tasks and commands necessary to configure and maintain access servers or routers

• Release Notes
  Release note documentation for Cisco IOS Release 12.1-based releases and various platforms

• Caveats
  Caveats documentation for Cisco IOS Releases 12.1 and 12.1 T (includes open and resolved severity 1 and 2 caveats and select severity 3 caveats for all platforms)

• New Feature Documentation
  Feature documentation for new features released after Cisco IOS Release 12.1 (early deployment and limited lifetime releases)

• Supporting Documents
  Cisco IOS Command Summary, Cisco IOS Debug Command Reference, Cisco IOS Dial Services Quick Configuration Guide, and Cisco IOS System Error Messages

• Related Documentation
  Programming guides, implementation guides, and other reference guides for use with Cisco IOS Releases 12.1 features

• Tools, Maintenance, and Troubleshooting Tips for Cisco IOS Software
  Online links to documentation set, maintenance, and troubleshooting tools and tips