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Cisco LAN Switching Fundamentals by Basir Sakandar - CCIE No. 6040, David Barnes - CCIE No. 6563

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Checking Software Versions

One of the most important steps in troubleshooting a Catalyst switch is to determine the software that it is running. The software version provides a wealth of information in many troubleshooting cases:

  • Check whether the switch code is General Deployment (GD). GD code is preferred because it provides greater stability. Only bug fixes are integrated in GD codes; no new features are added, which translates to fewer bugs introduced. Typically, customers run non-GD code when they require a new feature that is not available on the GD code.

  • Check how old the software is. It is not unusual to see an enterprise customer running a 5-year-old code. This is not acceptable because of bug fixes and possible security holes in some ...

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