What are Border Gateway Protocol Attributes and examples?
What are Border Gateway Attributes, what are they, how do they work, and their significance in shaping internet routing. What Are BGP Attributes? In the context of BGP, attributes are pieces of information associated with each route in the BGP …
Why is BGP so important to the Capital I Internet?
At the core of this interconnected web of networks is the Border Gateway Protocol (BGP), a fundamental routing protocol that plays a pivotal role in directing internet traffic. In this post, I will explore the significance of BGP and why …
What is TCAM memory in a router? and is it still needed?
Many higher-end routers have a specialized type of memory known as TCAM (Ternary Content Addressable Memory). In this post, I will explain the intricacies of TCAM memory in routers, exploring what it is, how it works, and its critical role …
What is BGP next-hop-self and why you should care?
In this blog post, we’ll demystify the concept of next-hop-self in BGP, why it’s crucial, and how it affects routing decisions. What Is Next-Hop-Self in BGP? In BGP, the “next hop” is the IP address used to reach a particular …
What is a LAG port in the switch network world?
In this blog post, we will delve into what a Network Switch LAG is and how it can significantly enhance the performance and reliability of your network. Unpacking the Concept: What is a Network Switch LAG? Link Aggregation, or Network …
Why ISPs Should Totally Rely on Google and CloudFlare for DNS (Wink)
Guest Post From Glenn Kelley at Connectivity Engineer “Why ISPs Should Totally Rely on Google and CloudFlare for DNS (Wink, Wink)” Alright, folks, gather round as we explore the hilariously absurd notion that Internet Service Providers (ISPs) should shirk their …
If you are an ISP, run your own DNS resolvers
Glenn Kelley has a great article on spinning up your own DNS resolvers. This is a critical piece of infrastructure if you are in internet Service Provider (ISP). https://www.linkedin.com/pulse/making-dns-server-your-network-uses-root-hints-glenn-kelley As Glenn writes. Here’s why ISPs should consider running their own: …
Unpopular opinion: BGP should accept smaller than a /24
For years, we have heard of the depletion of IPv4 address space on the Internet. At the same time, more and more networks are coming online. Out of these new networks, we have an ever-increasing number wanting to participate in …
Internet Service Providers, latency, customers, and how it all fits together
I have noticed a trend regarding customers and latency in the Internet Service Provider (ISP) world. Those in the industry know all about customers and speed tests. Love or hate them, the speed test is a way of life for …
Understanding what is Ethernet Virtual Private Network ( EVPN )
Ethernet Virtual Private Network (EVPN) is designed to provide scalable and efficient data center interconnectivity. Built upon the foundation of traditional Ethernet, EVPN incorporates the best features of layer 2 and layer 3 protocols to create a flexible and secure …