Orhan Ergun
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Orhan Ergun
MPLS Traffic Engineering Fast Reroute Link Protection
MPLS Traffic Engineering Fast Reroute Link Protection – I will explain it in plain English and the most important point of MPLS TE FRR Link Protection among other Fast Reroute mechanisms. Sometimes I am surprised that we have a very long technology names in networking ? Okay, let me explain briefly what is […]
The post MPLS Traffic Engineering Fast Reroute Link Protection appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
What is GLBP and where GLBP should be used ?
GLBP stands for Gateway Load Balancing Protocol. In this article, I will explain where GLBP is used , where it shouldn’t be used with the topologies. GLBP is a Cisco preparatory protocol. In most networks, design requirements might be to use only standard based protocols. If that is the case, GLBP is not a standard […]
The post What is GLBP and where GLBP should be used ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Is Inter-AS MPLS VPNs commonly deployed ?
Is Inter-AS MPLS VPNs commonly deployed ? In real-life deployment which Inter-AS MPLS VPN Option is most common ? What are the use cases of Inter-AS MPLS VPNs ? This is not a theory post , I will share practical information with you. For those who want to learn the details of Inter-AS MPLS […]
The post Is Inter-AS MPLS VPNs commonly deployed ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
New design of www.orhanergun.net
I used to receive many queries on design of website and we did few changes. Changes especially on the homepage. Previously the blog posts were in the orhanergun.net/blog and we moved them to homepage. So they are now accessible directly from the homepage which is www.orhanergun.net Also, added an announcement section to homepage where you will […]
The post New design of www.orhanergun.net appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Very important update on CCDE Practical Exam Result !
As you might know May 2017 exam was cancelled due to leakage and I shared a post on it on May. It was very important step taken by Cisco to secure the exam. Now, it seems another important step is taken by Cisco. Below message sent by Pearson to the CCDE Practical […]
The post Very important update on CCDE Practical Exam Result ! appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
BFD is not a Fast Convergence mechanism !
BFD is not a fast convergence mechanism. BFD stands for Bidirectional Forwarding Detection. It is an important tool for the IP layer but there is a confusion in the network community about it. BFD is a failure detection mechanism. Link and node failures can be detected with it. Without BFD, detection can be done at Layer […]
The post BFD is not a Fast Convergence mechanism ! appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
OSPF Prefix Suppression helps company to use 200 routers
OSPF Prefix Suppression helps to company to use 200 routers in their network without any problem. You can think that, some companies use more than 200 routers in their OSPF network, why this post is special? You will understand why in 10 minutes. Yes that is true but those companies have either multi-area OSPF […]
The post OSPF Prefix Suppression helps company to use 200 routers appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Check these 5 things when you add new technologies on your network
Networks can be really simple but we insist on making it complex ! If you are adding new technologies onto an existing network, these sorts of questions should be kept in mind: 1. What can be broken? You need to make sure, when you add new protocols or technologies on to an […]
The post Check these 5 things when you add new technologies on your network appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Are you an Intelligent fool ?
Most fundamental network design attribute should be simplicity. When you have a simple network, you can have secure, flexible , scalable, understandable , in fact all important design requirements can be achieved. But having simplicity is easy to say, hard to achieve. On the other hand, some amount of complexity is required, as […]
The post Are you an Intelligent fool ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
What is KISS Principle ? Keep it Simple and Stupid ?
What is KISS Principle ? Okay it stands for Keep it Simple and Stupid but what does really it mean in networking ? Can we really make things simpler ?. Probably yes but should we ? Let’s remember What Einstein said about simplicity. ” Everything should be made as simple as possible, but no […]
The post What is KISS Principle ? Keep it Simple and Stupid ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Did you see my Networkcareer.net Interview?
I recently made an interview with networkcareer.net I talked with Daniel many things on networking, brief overview of my story , predictions for the future of networking, recommended community platforms for the network engineers and many other things ! This is a new website which provides many good interviews on networking. There are many good […]
The post Did you see my Networkcareer.net Interview? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Settlement-Free Peering Requirements
Settlement-Free Peering Requirements. I explained the Peering , Types of Peering basics in one of the previous posts. When we talk about peering, we generally mean settlement-free peering. But what are the common requirements for companies to peer with each other ? Settlement-free peering is called as Internet Peering as well. So, companies setup […]
The post Settlement-Free Peering Requirements appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
GRE Tunnels – Generic Routing Encapsulation – Use Cases
GRE Tunnels GRE tunnels are by far most common tunnelling technology. Very easy to setup, troubleshoot and operate. But in large scale deployment, configuring GRE tunnels become cumbersome, because GRE tunnel is a point to point tunnel. GRE Tunnel Characteristics • GRE tunnels are manual point to point tunnels. Tunnel end points are not automatically […]
The post GRE Tunnels – Generic Routing Encapsulation – Use Cases appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
What is IPv6 Dual stack? What does IPv6 dual stack exactly mean?
What is IPv6 dual stack ? From some questions and comments on the website, I understand that there is a confusion about it. So, what does exactly dual stack IPv6 mean ? IPv6 is not a luxury anymore. It is not avoidable for the Service Providers especially. The biggest problem for the Service Providers […]
The post What is IPv6 Dual stack? What does IPv6 dual stack exactly mean? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
What is Layer 0 in the OSI Layers ?
What is Layer 0 in the OSI layers ? Isn’t OSI (Open Systems Interconnection) seven layers? Yes it is. In the standard, seven layers have been defined. Just let’s remember the seven layers of OSI. Layer 7: The application layer. Layer 6: The presentation layer. Layer 5: The session layer. Layer 4: The […]
The post What is Layer 0 in the OSI Layers ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Is it really hard to spell ‘ Orhan Ergun ‘ ?
Is it really hard to spell ‘ Orhan Ergun ‘ ? I see a lot of different variations of my name, its funny though ? Below are some search keywords which people used to find something related with me. I know my name is not very common. In fact, among English speaking people, one […]
The post Is it really hard to spell ‘ Orhan Ergun ‘ ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Flat OSPF network is not a problem ! But
Flat OSPF network, or single area OSPF networks are real. In fact most of the OSPF network today deployed, is flat OSPF networks. But how many routers can be placed safely in an OSPF area ? Any number from the real world OSPF deployment ? I will share in this post. Let me explain what […]
The post Flat OSPF network is not a problem ! But appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Last 10 days for the August 2017 CCDE Online Bootcamp
My Webex based, Online CCDE Bootcamp will start in 10 days. August 7, 2017 is the first day of my live CCDE Bootcamp. As the best CCDE Training, I will cover all CCDE Blueprint topics as usual. Before and after the Bootcamp, there are many other resources which you will go through. These […]
The post Last 10 days for the August 2017 CCDE Online Bootcamp appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Moved to new house , Finished the new course but !
I have been very busy for last one month. I announced 2 , 3 months before Service Provider Design Workshop and conducted it at last two weekends. I moved to new house, lot’s of things to deal with, believe me. First time I will share the photos of it here. Meanwhile I […]
The post Moved to new house , Finished the new course but ! appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Study tip – How you should read the posts on any website
You search something on Google, or read the materials by referrals. You do research on a particular topic and find many resources. How you are organizing your study ? What is the most important thing even before you start reading any technology topic ? Technology is changing g too fast. At least the many areas in networking. […]
The post Study tip – How you should read the posts on any website appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.