[Solution] Speed / Duplex auto-negotiation fails between Cisco and Tandberg

In the last weeks I was working closely with a Cisco Telepresence team to identify a issue regarding poor performance of the video systems. We did find pretty quickly the issue as being the failure of auto-negotiation of Speed and Duplex on the connection between Cisco switch port and Tandberg endpoint devices.

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Juniper, first steps after power-on the device

As you know from my previous posts, I’m trying to find time to gain some Juniper knowledge. During this “quest” I will add here some basic things about how to start working with Juniper devices. For now I know only the basics of Juniper configuration, but I hope that soon you’ll find here some more challenging scenarios.

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Cisco Menu for Console Server

Let’s say that you have a Cisco router that you use as console server to connect to your devices in the CCIE testing rack. If you want to allow other people to access your rack for training and don’t want to mess explaining how to connect to different device from the console router, then you need a menu for easy access.

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IP Prefix-List tricky question

A few days ago I did encounter a task in one of these preparation workbooks for CCIE R&S Lab which was very tricky. This task is not a hard one and does not require extensive knowledge (it can be a CCNP level question as well), but the way the question is formulated can create confusion.I would appreciate your comments on this topic.

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Packet header graphic representation

I was surfing the Internet in search of some good drawing representing packet header and I come across five excellent diagrams large enough ( 1050px wide ) to use digital but also for printing. The person behind these excellent drawings is Matt Baxter, but his site (fatpipe.org) is not accessible anymore. I found these documents on the Internet and I thought to add them here together.

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Selective BGP Dampening and parameters tuning

Some time ago, I wrote about BGP Dampening and how this feature can improve the stability of the network. A lot happened since then and during my experience with different service providers I have seen that BGP dampening can help in the same measure at it can harm your network. An endless discussion can be started on this topic, but this is not what I want to do here.

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BGP Conditional Advertisement

BGP Conditional Advertisement – it let the impression of a very complex task. Actually you will find it very easy to implement once you understand it.

In simple words I would say  that BGP conditional advertisement it’s a feature that let you advertise a prefix to one of your neighbors if mandatory condition is satisfied. To implement this feature you must configure at least two of the following three maps:

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Free Streaming CCNA Voice Bootcamp from INE

I got today a newsletter from INE announcing a freebie. You have it below. Enjoy!

Free Streaming of our NEW
CCNA Voice Bootcamp Course!

FOR A LIMITED TIME until March 31st, 2012, get FREE streaming
of the NEW CCNA Voice Bootcamp Course with CCIEx2 #14073
Mark Snow when you become a member with INE!
Registration today for free!

The CCNA Voice class is an ultimate all-in-one solution for engineers pursuing the Cisco Certified Network Associate Voice (CCNA Voice) certification. This Video-on-Demand course includes over 25 hours of instructor-led content that will fully prepare you for the latest Cisco 640-461 ICOMM v8 certification exam. Please note that per Cisco CCNA Voice certification requirements, you need to have already met the pre-requisite of having a valid regular CCNA (Routing & Switching) status. View this course on your desktop computer, iPhone®, iPad® or other .mov video file format compatible devices. Learn more »

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