Currently viewing the category: "Tips&Tricks"

Cisco tips: Track down communication issues – Part 1

By On March 15, 2010 · 3 Comments

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 issue start by [...]

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Cisco: How to determine the serial number of hardware components

By On June 12, 2009 · 2 Comments

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 [...]

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Category 6 UTP

By On May 6, 2009 · 2 Comments

Category 6 cable, usually Cat-6, is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e and Category 3 cable standards. The main difference between Cat-6 and it’s previous versions is that CAT-6 fully utilizes all four pairs. Cat-6 features more stringent specifications for crosstalk and system [...]

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10 tips that I can tell you about Cisco CCIE exam preparation

By On March 20, 2009 · 5 Comments

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 [...]

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Cisco: How to achieve network redundancy with 2 interfaces

By On March 19, 2009 · 1 Comment

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 [...]

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How to protect your network and users with not additional costs

By On February 21, 2009 · 2 Comments

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 (intentionally or not) the webpages [...]

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Cisco: TCP and UDP small servers

By On February 20, 2009 · 1 Comment

Do you like Linux with all this services that you can enable on the fly when you want to test something? I know that I really like Linux boxes. But what about Cisco? Well Cisco supports also some services to be enabled for testing purposes. This are called “TCP and UDP small servers”.

Maybe I [...]

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Cisco hidden tool: test crash

By On November 13, 2008 · Leave a Comment

This is pretty old trick, so maybe  you already know it, but for the rest of you, it can be interresting.

You just had a crash on you Cisco hardware and you have the logs, but don’t know exactly what caused this crash. You tried to have the device crash again, to compare the logs [...]

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