Orhan Ergun

Author Archives: Orhan Ergun

Tier 1, Tier 2 and Tier 3 Service Providers

Tier 1,Tier 2 and Tier 3 Service Providers What is tier in the first place ? If you are dealing with Service Provider networks, you hear this term a lot. But how we define Tier 1,Tier 2 and Tier 3 Service Providers ? What should be their infrastructure to be seen as Tier 1 for example […]

The post Tier 1, Tier 2 and Tier 3 Service Providers appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Is Fate Sharing bad thing in network design ?

Is fate sharing bad thing in network design? Someone asked this question recently on my youtube channel and I want to share a post for the website followers as well. First of all, what is fate sharing ? Below is the Wikipedia definition of fate sharing. ” Fate-sharing is an engineering design philosophy where related parts of a […]

The post Is Fate Sharing bad thing in network design ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Packet loss with Fast Reroute

Packet loss with Fast Reroute Do we still lose packet with fast reroute? One of my students asked me this question. And I would like to share the answer with everyone. Before we discuss whether or not we lose packet with fast reroute mechanisms, let’s remember what fast reroute is. It is pertinent to know […]

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Is LISP (Locator Identity Separation Protocol) Dead?

Today, there are many networking technologies which haven’t been widely deployed. And among them are Internet Multicast and IPv6 although these two protocols have many benefits .  But probably people are asking the correct question. Do we really need new protocol ? Or can we solve our problem with the existing mechanisms deployed on our […]

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Introduction to VPN (Virtual Private Network)

Introduction to VPN (Virtual Private Network) Let’s start with the definition. VPN is a logical network and created over shared physical infrastructure. Shared infrastructure can be private such as MPLS VPN of a Service Provider or over the Public infrastructure such as Internet. There are many concepts to understand VPN in detail but in this […]

The post Introduction to VPN (Virtual Private Network) appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

I discussed some IP Mobility solutions including LISP

Couple days ago I discussed some IP Mobility solutions, including LISP (Locator Identity Separation Protocol) with the CCDE students. Basically all IP Mobility solutions work in a similar way. New location of the host Address needs to be learned either via routing system or authoritative server. Host information is called identity and it can be MAC […]

The post I discussed some IP Mobility solutions including LISP appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Is Cisco CCDE exam harder than CCIE ?

Is Cisco CCDE exam harder than CCIE exam ? This is one of the most commonly asked questions by the CCDE candidates.  Short answer is no. But, you should know the differences between the CCIE vs. CCDE as well. CCDE exam is scenario based. You have four scenarios which is called as Lab or practical […]

The post Is Cisco CCDE exam harder than CCIE ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Orhan Ergun Youtube Channel

Orhan Ergun Youtube Channel I have been sharing technology based videos on my youtube channel for some time. I will hopefuly share more often public videos out there ! I just don’t want to share technical videos, but my training updates, bootcamp announcements, success stories and the things which make me happy or mad ! […]

The post Orhan Ergun Youtube Channel appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Is Cisco CCDE Exam Vendor Neutral ?

Is Cisco CCDE Exam really vendor neutral?.Recently one of my CCDE Bootcamp students asked me this question. He heard that DMVPN might come in the exam. In the beginning of my each CCDE class, I introduce the topics which will most likely asked in the CCDE Practical exam. Cisco claims that CCDE Practical exam is […]

The post Is Cisco CCDE Exam Vendor Neutral ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

40% discount for the NEW YEAR on all CCDE Products !

    40% New Year Discount On all CCDE Products Starts December 16 Thru 31 of December 2016 40% OFF On Below Products !  CCDE In-Depth  New CCDE Workbook buy now » Live/Instructor-Led  Online CCDE Training  buy now » Self Paced CCDE Training Lifetime Access buy now »   Note : Discount is valid for both Online Instructor Led […]

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Don’t miss this opportunity

*|MC:SUBJECT|* Black Friday & Cyber Monday Black Friday Thru Cyber Monday Special Discount Starts November 24 at 5PM PST Thru November 28 9PM PST 30% OFF On Below Products !  CCDE In-Depth  New CCDE Workbook buy now » Live/Instructor-Led  Online CCDE Training  buy now » Self Paced CCDE Training  Lifetime Access buy now »

The post Don’t miss this opportunity appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

These 7 people passed the CCDE Practical exam with my training

I am glad to announce that 7 of the attendees passed the CCDE Practical Lab exam in November 17, 2016 after attending my CCDE Training Program and got their CCDE numbers.   Chintan Sutaria – CCDE 2016::26 Mazin Ahsan – CCDE 2016::30 Tahir Munir – CCDE 2016::31 Michael Zsiga –  CCDE 2016::32 Felix Nkansah -CCCDE 2016::36 Andre Dufour  – CCDE […]

The post These 7 people passed the CCDE Practical exam with my training appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

CCDE In-Depth: The New CCDE Book of Orhan Ergun Is Available

Finally, I have published my new CCDE book titled CCDE In-Depth. The much-awaited book is available in three version: PDF, Kindle and Paperback versions. You can purchase the PDF version directly from this website. And if you need the Kindle and Paperback version, it is available on Amazon. Why This Book Is the Best for CCDE […]

The post CCDE In-Depth: The New CCDE Book of Orhan Ergun Is Available appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Last Three days for the 10 days Online CCDE Practical Bootcamp

Last three days for the November 10 days Online CCDE Bootcamp ! By November 1, I am going to start my NEW CCDE Practical Lab Training. There are couple things to highlight. Online Bootcamp is Instructor-Led Bootcamp. I will be in the class and explain everything you need to pass the CCDE Practical exam. Instructor Led doesn’t […]

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Benefits of MPLS – Why MPLS is used ? – MPLS Advantages

Benefits of MPLS, Why MPLS is used on today networks and the Advantages of MPLS will be explained in this post. As an Encapsulation and VPN mechanism, MPLS brings many benefits to the IP networks. In this article most of them will be explained and design examples will be shared by referring more detailed articles on the website as […]

The post Benefits of MPLS – Why MPLS is used ? – MPLS Advantages appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

BGP in MPLS Layer 3 VPN – BGP as a PE-CE Routing Protocol

BGP can be used as a PE-CE routing protocol in MPLS Layer 3 VPN. Also Service Providers run MP-BGP (Multiprotocol BGP) if they have MPLS Layer 3 VPN. In this article, MP-BGP will not be explained since it has been explained here earlier in detail. When BGP is used as a PE-CE routing protocol between […]

The post BGP in MPLS Layer 3 VPN – BGP as a PE-CE Routing Protocol appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

OSPF to IS-IS Migration

There are many reasons of OSPF to IS-IS migration, specifically for the Service Provider networks. Some of these reasons are shared later in the case study. OSPF to IS-IS migration can be done in three ways. In this article I will share, ‘  ship in the night approach ‘ which relies on having both routing […]

The post OSPF to IS-IS Migration appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

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