Lab Tips: Undebug All

The fastest way to cancel annoying debug printouts is just blindly typing "u all(enter)", a couple of times, like this:

RouterA# u all

This is exactly the short form of "undebug all" command.

Lab Tips: Avoid repeated Password/Enable typings

Just cut-and-paste the following command slice into your console:

line con 0
 no login
 privilege level 15
line vty 0 15
 no login
 privilege level 15

Tips to clear Cisco VTP revision number

VLAN revision number is a crucial variable of Cisco's VTP (VLAN Trunking Protocol) . It mus be cleared to zero to be safely deployed. However, there is no specific command to do this.

To clear VTP revision number, the fastest way is to switch VTP mode to "Transparent Mode", and then switch back.

Another way to do the same thing is to change the domain string, and then back. But we would have to touch the domain string: it is where typo errors are easily made!