I guess my question is good!!!! as I havent worked in real world (net. engin) ,so I want to know that when I need to Tshoot any problem in my big network than on that time do I need to know DEBUG plus SHOW commands or I can use "SH RUN" which is my best ????
Means I am very good with sh run but I heard that I need to know all debug and show commands it must !!!!
Pls answer me EXPERTS
Best way to proceed is to use the show commands and, if you are not able to troubleshoot with them or the issue is complex and dictates the use of debug commands, go ahead with the debug commands. Before you use the debug commands, you should have an understanding and the reason why you are going to proceed with this method. I recommend you to practice doing labs and understanding the outputs. Even though the debugs are intensive, obviously some are much more intensive than others, knowing that will help you as well in order to use the correct heavy artillery.
Since debug can have a performance impact, it is best to be avoided if the problem can be resolved without it. In real world scenarios, knowing how to get pertinent information from various show commands is a must. One basic example of this is that a running configuration would show nothing with relation to any dynamically learned routes that could be impacting traffic flow.