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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 Service Provider
  • 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

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.

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Keeping the Cisco CCDE Exam Secure!

CCDE Exam Security – 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. …

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Is LISP (Locator Identity Separation Protocol) Dead?

Is LISP 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 .

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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 …

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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.

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DMVPN – Dynamic Multipoint VPN Basics/Fundamentals

DMVPN Basics- In this article you will learn about the DMVPN design along with various IGP protocols such as EIGRP,OSPF and BGP. I am explaining this topic in deep detail in my Instructor Led CCDE …

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MPLS VPN and DMVPN Design Challenge

MPLS VPN and DMVPN Design – MPLS VPN is used mostly as primary connectivity and DMVPN as a backup in the small medium business. You might see in some cases DMVPN is the only the …

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OSPF Design Challenge

OSPF Design Challenge – OSPF and MPLS is most commonly used two technologies in an MPLS VPN environment. In this post I will share a mini design scenario with you and ask couple questions about …

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OSPF Design Discussion

OSPF Design Discussion – In the below picture, where should you place an OSPF ABR (Area Border Router) to scale OSPF design ? Why ?

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IS-IS Suboptimal Routing Design

IS-IS Suboptimal Routing – If you design multi level IS-IS network and if you have more than one exit (L1-L2 routers) from the Level 1 domain, you will likely create a suboptimal routing. Multi-level IS-IS …

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Bin Packing Problem of Distributed Traffic Engineering

Bin Packing Problem ? What is Bin Packing ? I will explain in this post Bin Packing Problem in MPLS Traffic Engineering.

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What is Deadlock situation in MPLS Traffic Engineering ?

What is deadlock situation in MPLS Traffic Engineering ? What happens when deadlock occurs ? Is there any mechanism to prevent deadlock ? I will explain all the details in this post.

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