‘enable’ Requires 200mg Caffeine

Here’s a quick refresher on why it’s a good idea to stay away from enable mode on routers before you’ve had a couple cups of coffee:

drvr-wifi#show flash
System flash directory:
File  Length   Name
  1   4707392  cxxxx-bnt-3mz.122-5f.bin
[4707456 bytes used, 3681152 available, 8388608 total]
8192K bytes of processor board System flash (Read/Write)
drvr-wifi#delete cxxxx-bnt-3mz.122-5f.bin
Delete filename [cxxxx-bnt-3mz.122-5f.bin]?
Delete flash:cxxxx-bnt-3mz.122-5f.bin? [confirm]
drvr-wifi#copy tftp:// flash:cxxxx-bnt-3mz.122-5f.bin
Destination filename [cxxxx-bnt-3mz.122-5f.bin]?
Loading cxxxx-bnt-3mz.122-5f.bin from (via FastEthernet0): !
%Error copying tftp:// (Not enough space on device)
Proceed with reload? [confirm]
System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C1700 platform with 32768 Kbytes of main memory
boot: cannot determine first file name on device "flash:"

For those of you not familiar with Cisco routers, what I inadvertently did was delete the firmware on the router, try to copy a new firmware to it, and missed the ‘Not enough space’ error that popped up. Upon reboot, the router couldn’t boot anymore and I was dropped to a rommon prompt.

For anyone else who might run into this, there is a handy guide on reflashing IOS from rommon and TFTP available at the Cisco Blog.

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