In theory, once a device is configured and working it should stay that way, but, often, you will be working on a network which you didn’t configure, or you will be working on a shift pattern supporting many unfamiliar networks on which changes have been made, causing one or more issues for the company. I suggest you revist this section after completing a few labs in this guide as the days progress.
Common Switch Issues
Can’t Telnet to Switch
The first question is was Telnet ever working? If it was and is no longer, then perhaps somebody has . . .
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