Understanding the BGP No-Export Attribute
The “no-export” attribute in BGP is a configuration option applied to specific routes to restrict their propagation beyond an autonomous system’s (AS) boundaries. In the realm of BGP, ASes are individual networks or a collection of IP prefixes under a …
Understanding the BGP Origin Code Attribute
Understanding the BGP Origin Code Attribute The BGP Origin Code is a mandatory attribute attached to BGP routes, indicating the origin of a particular route in the BGP table. It specifies how a route was introduced into BGP and provides …
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 …
The Little Packet that could. A journey of a network packet through the Internet.
In the vast and interconnected landscape of the digital world, data packets are the unsung heroes that power our online experiences. These small, seemingly unremarkable data units are like the “Little Engine That Could,” tirelessly chugging along to ensure our …
What is a networking packet?
As we use the internet to send and receive data, it is crucial to understand the underlying mechanics that allow this to happen. One of the most fundamental components of this process is the packet. In this blog post, we’ll …
Cloudflare Internet speedtest
Check your internet speed with Cloudflare’s very own internet speed test. https://speed.cloudflare.com/
A tool to find out if BGP is lying to you
APNIC has a bog article on detecting “bgp lies”. https://blog.apnic.net/2021/05/24/a-tool-to-detect-bgp-lies/Do you ever wonder whether you can really trust other networks, such as your provider(s) and peers? More precisely, wouldn’t you like to be able to tell if the traffic you send always …
Common ISP outage causes
Over the years I have been able to narrow the most common reasons a service provider goes down or has an outage. This is, by no means, an extensive list. Let’s jump in. Layer1 outages Physical layer outages are the …
New Speed Test server for Patreons
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this …
Video on how the Internet Works
I have a few nitpicky things and the video seems a little contrived, but it’s decent nonetheless. WISPs are not really mentioned, but others are not as well.