Show tech
The fact that 'show tech-support' is usually abbreviated to just 'show tech' (especially when done verbally) has delayed the response to many Cisco support cases. Way back, the Cisco support organization used to be called the Technical Assistance Center, or TAC for short. They'd usually be the ones asking for the 'show tech' output when you raise a case. Also, more senior engineers usually get pre-PFYs (PFIEs?) to log support cases for them with the comment "oh, and go ahead and collect a 'show tech' already now, 'cos they're gonna ask for it".
The less experienced would log on to the device and not collect a 'show tech', but rather a 'show tac', which the CLI expands to 'show tacacs' - which essentially just shows you the IP and status of the configured TACACS+ authentication servers. This is typically 5-15 lines of output - compared to the thousands you'd get from a 'show tech-support'. They'd then happily attach that output and go home for the day (because these issues only happen after 4 pm in the day), delaying any further progress until the next morning.
Biting the hand that feeds IT
