Hamed Zolghadri

CCDE #20150003

Roy Lexmond

CCDE #20150017

Daniel Lardeux

CCDE #20150039

Mohamad Haddad

CCDE #20150040

Johnny Britt

CCDE #20150036

Martin Duggan

CCDE #20160006

What my students have said


Roy Lexmond

Senior Network Designer at Routz

After I attended Orhan Ergun’s CCDE course I passed the CCDE practical exam.I really enjoyed the course a lot, I choose to attend because of the great posts that Orhan is putting on his website and the fact it’s 2-3 hours per session two times a week so you can combine it very good with work and private. Before I signed up I didn’t know what to expect but it’s for sure a great design course and preparation for the CCDE exam. Mainly because of the interaction with Orhan who is really an expert in explaining all the different technologies and making perfect designs out of them. CCDE #20150017 CCIE R&S #26557

daniel lardeux

Daniel Lardeux

Senior Network Consultant at Post Telecom

I passed the CCDE Practical exam and Orhan’s CCDE course was very important contributor to my success. I attended the CCDE course of Orhan Ergun in July and it was exactly what I needed, Orhan is taking the pain to break down the different technologies. Very useful even for every the day work thus it is really helpful. Time spent at the CCDE Class is also very incisive opening me up to how to attack the exam. Thank you Orhan with who I have been in contact with throughout this quest and always made himself available to answer any questions I had. He is instrumental in my learning and helping me prepare the CCDE who one of the most rigorous Network Design exams in the industry, Thank again Orhan. CCDE # 2015::39


Ruslan Silyayev

Solution Architect at R.I.S.K Company

Training by Orhan is not a CCDE preperation training only. It will be usefull for engineers which are dealing with designing networks in their daily basis. Orhan’s CCDE training gives detailed understanding not about field implementation of technology such as IOS commands,debugs etc, but it gives you understanding about how technology works, or which technology to choose in particular busines case, when,why and how to design it’s architecture. And after that Orhan guide you through “what-if something fails”cases, which are gives you more deep understanding about information you must take in consideration in you further technology selection and designing process to be sure that you network will not just work, but also will be stress resistant. Highly recommended for the network engineers,designers and solution makers. You will get live lectures, discussions and mentor which is always ready to help you and even discuss topics that are not covered in CCDE but are really important in design process. CCNP/CCDP/CCSP

muhammad abubakar

Muhammad Abubakar

Independent Network Consultant

I attended Orhan Ergun’s CCDE course in July. I have had a great time. It was not only an opportunity to sit with very intelligent and experienced individuals in network field, also the way Orhan is teaching was very friendly, rather than telling he is trying to deliver the knowledge of design and best practices. We discussed many design challenges relevant to real life network design and the information I learned from Orhan helped me to change my job too ! Thanks Orhan you were great. 2xCCIE SP|DC , JNCIE-SP, VCP-NV

ahmad manzoor

Ahmad Manzoor

Senior Manager at PTCL/Etisalat

Orhan is the best teacher in network design, I have learned a lot from him about the CCDE and real life network design.The depth knowledge of Orhan was very impressive. I got all the answer in detail to my questions. One more thing to add I found this boot camp a very useful with everything we talked about, that have opened my mind and gave me a good knowledge. I strongly refer this course to every candidate who is studying for the CCDE exam and want to learn real life Enterprise and Service Provider design. CCDA,CCDP

deepak kumar

Deepak Kumar

Senior Network Engineer at HCL

I attended Orhan’s CCDE Course and I must say the guy has exceeded my expectations in all ways in terms of quality, depth etc. I have been to another CCDE class from another vendor which was very different. That class was very different since for couple of days we only talked about some scenarios. While that is a good way to get feel of real exam, it hardly solves your fundamentals queries with technology from design standpoint. In Orhan’s  course he fills this huge gap by combining in depth technology discussion with mini scenarios and he even talks about his real life experiences with particular technology and challenges we might face which certainly most books and design documents don’t talk about. I would recommend this course to all potential CCDE Lab candidates and even to people which want to strengthen their network design skills in real life. CCDP, CCNP RS, CCNP DC, CCIP, CCSP


Amit Temkar

Technical Designer at BT

I became a member of orhanergun.net for the CCDE preparation. For CCDE exam, there are very few quality trainings available and some of those are only available in certain countries and are quite expensive, so decided to purchase Orhan’s training stuff. They are really good inclusive of both explanation of technical concepts and applying the same for practical scenarios keeping in mind the business constraints and objective. Of course its necessary to read lot of other stuff and understand the topic well but I believe Orhan’s training will be much helpful, will help us to know where to focus for CCDE, thus save time and also help us to become a good designer.

jason gooley

Jason Gooley

System Engineer at Cisco Systems

Orhan’s ability to cover the vast technical topics required for the CCDE is tremendous. He is not only very technical; he is also an amazing teacher. Orhan explains things to his students in ways that are very simple and easy to follow and he is very patient with his students. This is the second time I have attended his CCDE course and it just keeps getting better. If you couple his blog with his training courses you can’t go wrong. I recommend his CCDE training to anyone serious about wanting to attempt the CCDE exam, but also to anyone who wants to learn more about network design and become a better engineer in general. I will be taking my CCDE exam in the coming weeks. I can say that without Orhan’s help, I would not feel as prepared as I do. He is a great teacher, mentor and a close personal friend. Thanks Orhan! 2xCCIE, CCDP


Michael Zsiga

Lead Architect at ePlus

Orhan’s #CCDE Bootcamp has been a great resource for me. Orhan goes into a great level of detail to explain the design implications of each technology and the relationships with other technology that it could affect. Orhan’s case studies in each technology really pull everything together. One thing to state though, this is not something you should just take on a whim mind you, you really need to have the R&S and SP experiences to go down this path. Orhan’s CCDE Bootcamp is more focused on the case studies than teaching the theory of the technology. Orhan does go over the theory for each tecnology but this should be a review and not used to learn the technology for the first time. If you have the R&S / SP experiences to backup your understanding of the technology then I think Orhan’s CCDE Bootcamp is perfect for you.


Jeriel Atienza

Technical Board Advisor at Mundo Startel

I was super excited to the take the online class and I’m happy to say that the class was way beyond my expectations. I have learned a lot of design principles that I haven’t seen before and I would just say one thing, there are lot of vendors class out there that would help you get your CCDE Number. But from my experience of attending various bootcamps if your goal is to Design Better Networks by understanding all the principles on Looped and Routed networks, Orhan is the person you should definitely approach. You will not be able to get everything out of this 8 sessions class, but he teaches you the procedure and methodology also provides tones of scenarious. Thank you, Sir Orhan Ergun Online CCDE Sessions for inspiring and helping me to be a better designer engineer. Jeriel Atienza 3x CCIE# 24263 (R/S, VO, SP)


Avinash Gupta

Solution Architect at Zensar Technologies

Orhan Bootcamp is really informative & I gain lots of knowledge from him. It helps to prepare the CCDE & Also in your work environment. I recommend my friend and colleagues to join Orhan once to get the great knowledge about Network Designing. CCIEx4 (RS, SP, Voice, Datacenter)


Jigz Bagsic Jr

Senior Network Engineer at Alinma Bank/Saudi Arabia

I was glad attending Orhan online CCDE class last year. The manner he delivers the topic and explains each of our questions gave us the core fundamental functionality in-depth of the technologies. Which in result strengthen my network design skill either in the environment of service provider, enterprise and data center. The session helped me improve on how to understand and translate the business requirement into technical requirements CCIE#29481


Tony Vu

Technical Specialist at Optus

Your excellent CCDE materials and amazing Bootcamp helped me tremendously through my learning journey. Thank you Orhan and more power to you! CCIEx2 (SP, Datacenter)


Haroon Aslam

Network Consulting Engineer at Cisco Systems

I attended Orhan’s CCDE Bootcamp and it was great. He contributed immensely to our knowledge by developing core curriculum and providing instructional support which are both futuristic in nature and conform to CCDE standards. What I found to be Orhan’s best asset was his ability to utilize appropriate language and positive discipline to manage effective interactions with his students. As a model of appropriate behavior, he is in a league of his own and can provide extra instructional support based on individual student assessments. Every aspect of his teaching is innovative to say the least; instruction, Assessment, interaction, communication, documentation, administration and classroom management are just some of his areas of expertise as far as teaching is concerned.I am confident that he would contribute effectively to your CCDE. CCIEx2, CCDP


Garry L. Baker

Author at Packetpushers

I attended Orhan’s Pre-CCDE class and it was really helpful for me. Pre-CCDE class was a good introduction to the CCDE. You have to show up to class and be ready to ask questions as this is the only true way to get out what you put in. This class will give you a good idea of where you are and where you need to be to complete the CCDE. Orhan did a good job of talking about CCDE and design and showing you all the pieces you will need to put together to be successful not only in the exam but in the real world. CCNP,CCDP


Jennifer Pai

Network/Security Engineer at KNET Technology

Thanks Orhan very much for this course. It helped strengthen my “Network design mind”. I enjoyed the whole sessions of Orhan CCDE bootcamp course, which was very successful and interactive. Orhan CCDE bootcamp course is designed aimed for CCDE, which materials were comprehensive and extremely well organized. Orhan has been brilliant in bridging the gap between the knowledge of technology and the business strategies from design perspectives. The whole sessions delivered insightful views in each teach topic with various case studies. Orhan did carefully build up diagrams that presenting the ideas of designs so that the attendants could understand what was going on even things getting more complicated. Furthermore, Orhan has a good range of various case studies and that made course not only more interesting but really helped for realizing design concepts from the base of network knowledge. Orhan is an enthusiastic and supportive instructor, always provides helps/advice to learners anytime needed.  CCIE SP #47047


Sameer Meher

Solutions Architect at 23 Wards/Japan

Orhan Ergun’s CCDE course in Jan 2016 was very good. CCDE Level Intelligence was delivered very well and with very user friendly approach. Its a good Design Study which was been delivered,in understandable format . It is certainly helping me to transform in the world of Network Engineering.

I definitely recommend Orhan’s CCDE class to people who wants to learn network design.

2xCCIE (R&S and DC)


Anders C.Pedersen

Network Systems Engineer, CCIE #42544 at Conscia A/S

Orhan is forcing you to take off the implementation hat that most of us have been wearing for many years, instead he is providing a new fancy design hat, which makes you see and deal with the issues presented.

At the beginning of the bootcamp you many times are sitting thinking ‘I could solve this issue with some fancy trick/feature’, all because you keep thinking implementation. However as the days goes Orhan is helping you to fill your new fancy design hat with all the important information not only for designing, meeting business requirements, but also dealing with the interaction of the protocols.

If you’re trying to get your head into a new hat, chasing the CCDE exam, or just wants to get on top with network design, I would go to Orhan today.

Martin J Duggan

Martin J Duggan 

Network Architect at AT&T, Ciscopress Author, CCIE#7942

I attended Orhan’s April 201610 days  CCDE Bootcamp.

You can tell Orhan has a great deal of experience, it really comes through when he presents his design case studies and the CCDE Practical scenarios.

If you are approaching the end of your CCDE journey this is a good place to stop by and put it all together.

Thanks Orhan for everything !