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All
  • All
  • Announcements
  • Basic Networking
  • Best Practices in Network Design
  • BGP
  • BGP Security
  • BOOTCAMP ANNOUNCEMENTS
  • Broadband
  • CCDE BOOTCAMP
  • CCDE CERTIFICATION
  • CCDE Preparation Recommendations
  • CCIE Enterprise Infrastructure
  • CCIE SP
  • Certifications
  • Cisco SD-WAN
  • Cloud Computing
  • Data Center
  • Definitions
  • Design Scenarios
  • Discussions
  • DMVPN
  • EIGRP
  • Fast Convergence
  • FUNNY
  • IGP
  • Inspiring
  • Inter AS MPLS VPN
  • IOT
  • IPv6
  • IS-IS
  • Layer 2 Technologies
  • Life
  • LISP
  • Mobile Broadband
  • MPLS
  • MPLS Traffic Engineering
  • MPLS Transport Profile
  • MPLS VPNs
  • Multicast
  • Network Design
  • Network Monitoring
  • OSPF
  • Peering
  • Quality of Service
  • SD-Access
  • SD-WAN
  • Security
  • Segment Routing
  • Service Provider Networks
  • Sub Marine Cables
  • TCP - UDP - QUIC
  • Transport Network
  • Uncategorized
  • VPN
  • Wireless

Why submarine cable , why not satellite ?

Why submarine/subsea cables rather than satellite. Story between my friend who is from finance background and myself. Today, one of my friends who is totally foreigner to our industry,  visited me at home. It was …

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Wireless ISPs Spectrum Problem

Wireless ISPs also known as WISP mostly use unlicensed frequency spectrum. Frequency spectrum is the most critical asset for the Mobile and Wireless networks and it is sold in auctions for 100s of millions of …

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2018 was a good and busy year ! Things I have done during the last year

2018 is done! I wanted to share what I have done during the last year. During 2018, probably the biggest decision for me was establishing a company in Turkey. This photo was taken during a …

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BGP Optimal Route Reflection – BGP ORR

BGP Optimal Route Reflection provides Optimal Routing for the Route Reflector Clients without sending all available paths.

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Dynamic Network Diagrams, This is what we need!

We all create network diagrams. Network Engineers create network diagrams.  But for who ? When ? How they are accurate ? Do we really need network diagrams ? Let me share my thoughts with you.

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Fast Reroute, Fast Convergence, WRED and WFQ

Fast Reroute , Fast Convergence , WRED and WFQ. You may think that why Orhan is putting all these mechanisms together. I will give you an analogy. Those who participate my talks., know that I …

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IPv6 in Enterprise , Should we still talk about it?

5 years ago Jeff Doyle and I recorded a podcast on IPv6 in Enterprise. We talked about IPv6 addressing plan , adaption and growth rate of IPv6 in Enterprise.

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Is Protocol Independent Multicast (PIM) really Protocol Independent?

Is Protocol Independent Multicast (PIM) really Protocol Independent? What is that dependency? Does PIM require an IP or can it work with non-IP?

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What is last hop router and first hop router in Multicast?

What is last hop router and first hop router in Multicast? These are important  terms which are used in Multicast. In this post, I will explain the terms, differences and some detail about this term.

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May CCDE Practical exam results have been announced. Student feedbacks in this post!

Hello, May 2019 CCDE Practical exam results announced few days ago. I am happy to help 4 people to have their CCDE number on May 2019 exam. Congrats to Matt , Fredrik , Dmytro and …

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New book on LISP – Locator and Identity Separation Protocol

New book is released on LISP – Locator and Identity Separation Protocol. “LISP Network Deployment and Troubleshooting: The Complete Guide to LISP Implementation on IOS-XE, IOS-XR, and NX-OS”

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Real Life Financial Network Design – Multicast – BGP – EIGRP – Latency Design Considerations

I was in London last week for CCDE Training. During the training, there was a discussion on Financial network design and one of the students explained how they designed their financial world-wide network.

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