CCNA / CCNP candidates are going to be drilled by Cisco when it comes to troubleshooting questions. You’re going to have to be able to analyze configurations to see what the problem is (and if there is a problem in the first place), determine the meaning of different debug outputs, and show the ability not just to configure a router or switch, but troubleshoot one.
When you alpha belief for your CCNA and CCNP exams, abounding books will present you with a huge account of keystroke shortcuts for use on Cisco routers. While the 640-801, 811, and 821 exams may ask you about one or two of these, you absolutely accept to get hands-on acquaintance with these commands to adept them. Even better, there are some key combinations that Cisco routers mention, but again don’t acquaint you what they are! Let’s yield a attending at a few of the added accessible key combinations, and achieve with the “secret” way to stop a ping or traceroute.
The up arrow on your keyboard is abundant for repeating the endure command you typed. Let’s say you mis-enter an access-list. Instead of accounting it from the beginning, just hit your up arrow to echo it, again fix the problem.
CTRL-A takes the cursor to the alpha of a typed line. If you’ve accounting an continued ACL, you apperceive that can be a actual continued command, and one you apparently don’t wish to retype. If you get a carat advertence there is a botheration with the line, use your up arrow to echo the command. If you see the absurdity is abreast the beginning, use CTRL-A to move the cursor anon to the alpha of the line. CTRL-E takes the cursor to the end of a typed line.
To move the cursor through a typed band afterwards abatement characters, you’ve got a brace of options. I alone like to use the larboard and appropriate arrows, but you can aswell use CTRL-B to move aback and CTRL-F to move forward.
Finally, there’s the aggregate that Cisco mentions to you if you run ping or traceroute, but they don’t acquaint you what it is! If you forward an continued ping or a traceroute, you could be searching at asterisks for a continued time if you don’t apperceive this one. In the afterward example, a traceroute is acutely failing:
R2#traceroute 10.1.1.1
Type escape arrangement to abort.
Tracing the avenue to 10.1.1.1
1 * * *
2 *
The botheration is that you’re traveling to get 30 rows of those asterisks, which is arresting and time-consuming at the aforementioned time. Note the router animate bulletin “Type escape arrangement to abort”. That’s accessible – but what is it?
Here it is: Just blazon CTRL-SHIFT-6 twice, already appropriate afterwards the other. You won’t see annihilation on the router console, but the traceroute will terminate.