Hiding the information from network core
Hiding the information from network core is important. But why hiding the information is important ? What type of information we are trying to hide ? Why from network core only ? How we can hide the information from network core ? Let’s start, why information hiding is important. One of the […]
The post Hiding the information from network core appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
What is PLR – Point of Local Repair in MPLS Traffic Engineering ?
What is PLR, Point of Local Repair in MPLS Traffic Engineering ? PLR is the term is used in the context of Fast Reroute. I briefly mentioned from PLR in the MPLS Traffic Engineering Fast Reroute Link Protection post earlier and in this post, will explain it in more detail. Let’s look at the below […]
The post What is PLR – Point of Local Repair in MPLS Traffic Engineering ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
IPv6 Business Drivers and PI/PA Address Space
IPv6 Business drivers can be many and different businesses have different reasons to deploy IPv6 on their network. IPv6 is more commonly deployed in the Service Providers than Enterprises or Small Medium Businesses. Do you know why ? Main reason is IPv4 address space exhaustion. There is no available public IPv4 addresses in […]
The post IPv6 Business Drivers and PI/PA Address Space appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Network Interconnection videos have been added into Self Paced SP Training
Recently, I published Self Paced Service Provider Training Course. I didn’t make an Internet wide announcement yet as I still upload the content to the course. Though I haven’t announced it yet, some people have already purchased it and the previous Instructor Led Service Provider course attendees got the access to the self paced […]
The post Network Interconnection videos have been added into Self Paced SP Training appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Network Interconnections Video by Orhan Ergun
Network Interconnections is one of the most important topics for the operator network as it directly related with the cost of the sending traffic out from their networks. I published a network interconnection video on my Facebook page. I explain the peering types, settlement free peering , paid peering , remote peering , IP […]
The post Network Interconnections Video by Orhan Ergun appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
BGP Route Reflector routing loop problem !
BGP Route reflector routing loop arise in IP networks. In this post, I will illustrate the topology which will loop the IP packets between the routers and I will describe multiple possible solution and share a best practice to design BGP Route Reflector in an IP network. BGP Route Reflector Routing loop […]
The post BGP Route Reflector routing loop problem ! appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
IS-IS Case Study – Ausnet
This is a case study which provides a detailed design steps for IGP protocol on hypothetical Internet Service Provider, called Ausnet. You can download the Case Study as PDF format from the below link by providing your name and email address.
The post IS-IS Case Study – Ausnet appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
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.