Archive : Cisco

//Usually big companies with large network have a dedicated department which deals with all the network configuration.  The problem that I have in mind is when this department is splitted over large geographical areas (e.g. some colleagues in Europe, some in Asia and some in America) it may happen...

In one my previous posts, I shown you how to test a connection using a hidden Cisco IOS tool called TTCP.  A few days ago I run into an issue. I had to test a TCP connection to a remote Cisco router, but I had not other router on which to initiate the TTCP connection. As explained in Testing TCP Connection...

In the 1st Part of this series, I’ve described the most common steps that you should follow to troubleshoot a total lack of communication between a Layer 2 device (Cisco switch) and an end user connected device. As I promised here is the second part, in which I’ll try to show you what you...

You know how sometimes you plug in everything, configure device / ports and then the un-expected result is “not working”. Then you start to troubleshoot, which is a good point, but very important is where are you looking for the root cause of your issue. A lot of people who have communication...

Some days ago I had to check for the serial number of a faulty fan tray that need to be exchanged in C6500 series. Now most of you I believe know the commands “show version” or “show hardware” which will get all the information that you need most of the time, but not always. I...

Since now I’m closer than ever to my CCIE lab exam, I thought that it would be a good opportunity to share some of my preparation experience with you. Even if this post is focused of the CCIE preparation, I believe that you can take my advices into consideration even if you are preparing for some...

Sometime ago, during my preparation for Cisco CCIE certification, I encountered a task that I had to admit made me think a little bit, even I should see the solution from the first minute. The idea, at least as I see it, is that as much as you learn for some certification you start to see only the complex...

One of the biggest problems in today’s network security is users surfing on the Internet. I’m not against offering Internet access at work place or schools, for example, but I believe that some measures should be taken by the network administrators to limit the users from being able to access...