Nov
26
Congratulations go out to the newly minted Cisco Certified Design Experts that passed the Practical Exam after attending INE's CCDE Bootcamp with me in Chicago last week! So far I know of at least 9 students from this past week's class and previous ones that passed the practical this time around. Here's what some of them had to say: Read More
Oct
15
Starting next year Cisco will be offering the CCDE Practical Exam at many more locations beyond San Jose, Chicago, London, etc., and registration for the practical will be open up to the day before the exam. Another nice change is that candidates can take lunch break on their own time after finishing the second scenario in the exam, where previously they were required to wait until the set lunchtime was finished before continuing on with section 3. The specific announcement from Cisco is below,... Read More
Feb
26
This past week I took and passed the Cisco Certified Design Expert (CCDE) Practical Exam, making me CCDE #20130013, or CCDE #2013::13 in geek-speak.  Cisco doesn’t publish official stats on either the number of CCIE or CCDE certified people anymore, but per the unofficial stats of the CCIE/CCDE Hall Of Fame this makes me one of about 100 engineers globally that currently hold this certification.  Pretty neat, considering I thought being one of 7500 CCIEs was really cool back in 2001. In this... Read More
Feb
19
INE would like to send a big congratulations out to our very own Brian McGahan, who just moments ago took and passed the Cisco CCDE exam! Numbers are still forthcoming, but this being the first exam given in 2013, may well be CCDE #2013::1. Brian will be writing a more in-depth blog post here, outlining some of the more fundamental aspects related to reading and studying for the exam, but in the interim, we just wanted to say CONGRATULATIONS!! Read More
Jan
24
Just ahead of our brand new CCNA Voice live online bootcamp beginning this Monday, I thought it might be nice to provide an easy-to-follow graphic for those starting out in Voice (or on any other Cisco networking track). This graphic was from last year, but remains quite easy to follow for each and every Cisco track. Read More
Jan
03
Continuing my review of titles from Petr’s excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, here are further notes to keep in mind regarding EIGRP. About the Protocol The algorithm used for this advanced Distance Vector protocol is the Diffusing Update Algorithm. As we discussed at length in this post, the metric is based upon Bandwidth and Delay values. For updates, EIGRP uses Update and Query packets that are sent to a multicast address. Split horizon and DUAL form... Read More
Jan
01
This document is presented as a series of Questions and Answers, discussing various aspects of OSPF protocol designed to prevent inter-area routing loops and related issues. The discussion covers ABR functions, Virtual-Links, OSPF Super-backbone, OSPF Sham-Links, BGP Cost Community. Reader is assumed to know these concepts already, as this publication focuses on complex interaction features arising in MPLS/BGP VPN scenarios. The discussion is culminated by analyzing a number of issues arising... Read More
Dec
30
To start my reading from Petr's excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, I decided to start with: EIGRP for IP: Basic Operation and Configuration by Russ White and Alvaro Retana I was able to grab an Amazon Kindle version for about $9, and EIGRP has always been one of my favorite protocols. The text dives right in to none other than the composite metric of EIGRP and it brought a smile to my face as I thought about all of the misconceptions I had regarding... Read More
Nov
26
Problem Statement A popular task in CCIE-level scenarios requires creating an access-list matching a set of prefixes using the minimum number of access-list entries. Typically, such scenarios were relatively easy, so figuring out a combination of subnet prefix and wildcard mask was more or less intuitive. However, a good question would be if there exist a generic algorithm for constructing such "minimal" access-lists. To give you a better feel of the problem, let's start with an example. Look... Read More
Nov
22
Introduction BGP (see [0]) is the de-facto protocol used for Inter-AS connectivity nowadays. Even though it is commonly accepted that BGP protocol design is far from being ideal and there have been attempts to develop a better replacement for BGP, none of them has been successful. To further add to BGP's widespread adoption, MP-BGP extension allows BGP transporting almost any kind of control-plane information, e.g. to providing auto-discovery functions or control-plane interworking for MPLS/BGP... Read More

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