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 ?
What is happy eyeballs ?
This term is very important to understand if you are deploying dual stack IPv6 network.
Network Design Best Practices – Simplicity
Network Design should be simple! Simplicity is the first network design best practice that I want you to remember. If you have been in the field long enough, you have probably heard about the KISS principle.
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.
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.
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 ?
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.
Broadband Network Architecture – Access Network Models
There are many broadband services Service Providers offer to their customers today. As a network engineer you need to know the most common services and their advantages, disadvantages, design characteristics and so on.
What is Last Mile and First Mile?
What is last mile and first mile ? This is an important telecommunication term which is used in all broadband communication methods. In this post, I will explain the term, differences and some detail about this term.
Network Complexity
Network complexity plays a very important role during network design. Every network designer tries to find the simplest design.
What is MP-BGP – Multiprotocol BGP
MP-BGP (Multiprotocol BGP) is an extensions to BGP protocol. Standard BGP only supports IPv4 unicast address family, whereas MP-BGP supports more than 15 different BGP address families.
Inter AS Option B – Design Considerations and Comparison
Inter AS Option B is highly scalable, reasonably secure, but operationally complex inter autonomous MPLS VPN architecture.
Inter AS Option A Design Considerations and Comparison
Inter AS Option A is the easiest, most flexible, most secure Inter autonomous system MPLS VPN technology.
Keeping the Cisco CCDE Exam Secure!
One of the most important thing about CCDE exam is security. We all think that it is secure, it is not cheatable. There is no CCDE dump. We all believe that. CCDE exam has been around for more than 10 years and there are still only less than 500 people in the world. It seems what we think about exam security is correct.
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 .
BGP PIC Edge – Prefix Independent Convergence
BGP PIC Edge provides sub second convergence time in the case of edge link or node failure. BGP PIC is a useful for MPLS VPN service and can be provided by the Service provider as a value added service thus might provide additional revenue.
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.
BGP Route Reflector in Plain English
BGP Route Reflector in Plain English, in this post, I will explain you the BGP Route Reflector basics, after you read this post, you will be able to answer many questions regarding BGP Route Reflectors.
I am explaining this topic in deep detail in my Onsite CCDE , Live/Webex CCDE , Self Paced CCDE and also my specialized “BGP Zero to Hero” course.
Outline of this post is as below.
- What is BGP Route Reflector ?
- Why BGP Route Reflector is used ?
- What is the alternate methods ?
- Different type of BGP Route Reflectors
- Benefits of BGP Route Reflector
- Problems with the BGP Route Reflector
- BGP Route Reflector Redundancy
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What is BGP Route Reflector ?
A route reflector (RR) is a network routing component for BGP (RFC 4456). It offers an alternative to the logical full-mesh requirement of internal border gateway protocol (IBGP).
Above is the wikipedia definition of BGP Route Reflector. Let’s extend the definition a bit.
BGP Route Reflector Continue reading