This is a pretty useful piece of information that will make your network troubleshooting go quicker. I find it kind of hard to remember as it breaks with convention. You can’t use CTRL+Break, or any other normal ways to break a trace, ping or whatever in windows (CTRL+Z, CTRL+ESC, CTRL+C).
How to Break a Trace or Ping in Cisco Routers and Switches
Step 1 – Hit Control+Shift+6. That’s it. Some routers seem to want you to do it twice.