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Most Popular
Download Software
Get the latest updates, patches, and releases of Cisco software.
Bug Toolkit
Search for software bugs based on version and feature sets.
Error Message Decoder
Look up explanations for console error message strings listed in the Cisco Software System Messages guide.
Output Interpreter
Receive instant troubleshooting analysis and course of action for your router, switch, or PIX device using collected show command output.
Software Advisor 
Choose appropriate software for your network device by matching software features to Cisco IOS and CatOS releases, comparing Cisco IOS releases, or determining which software releases support your hardware.
TAC Case Collection
Interactively diagnose common problems involving hardware, configuration, and performance issues with solutions provided by TAC engineers.
For more information, see the video.
Command Lookup Tool
Look up a detailed description for a particular Cisco IOS, Catalyst, or PIX/ASA command.
