FirstDigest

Cisco Menu for Console Server

Calin — Sun, 22 Apr 2012 13:52:02 +0000

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...

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IP Prefix-List tricky question

Calin — Wed, 04 Apr 2012 08:29:24 +0000

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...

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Packet header graphic representation

Calin — Thu, 29 Mar 2012 10:50:23 +0000

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...

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Selective BGP Dampening and parameters tuning

Calin — Fri, 02 Mar 2012 09:42:44 +0000

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...

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Fiber Optic basics

Calin — Thu, 01 Mar 2012 21:50:55 +0000

I think all network engineers touched, if not used / patched, as least one time a fiber optic patch cord. As a network engineer you might not necessarily need to understand HOW fiber optic is...

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BGP Conditional Advertisement

Calin — Thu, 01 Mar 2012 10:11:10 +0000

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...

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Free Streaming CCNA Voice Bootcamp from INE

Calin — Sat, 25 Feb 2012 09:54:57 +0000

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 ...

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Cisco NX-OS Malformed IP Packet Denial of Service Vulnerability

Calin — Mon, 20 Feb 2012 18:42:43 +0000

Summary Cisco NX-OS Software is affected by a denial of service (DoS) vulnerability that could cause Cisco Nexus 1000v, 5000, and 7000 Series Switches that are running affected versions of Cisco...

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Which WAN Optimization vendor will consolidate and expand its market position on 2011

Calin — Mon, 30 Jan 2012 11:15:34 +0000

447 votes - Thank you all! I add the results in a blog posts so we can see over years on which optimization technology we were betting in 2011.

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CCIE home rack – Ubuntu persistent net rules

Calin — Sat, 26 Nov 2011 22:57:31 +0000

In one of my last posts, I was writing about my CCIE home rack which has one server that runs Ubuntu + Ethernet Quad cards + Cisco switches. Before connecting the cables between server and Cisco...

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