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 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 …
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 …
Problems with Borger Gateway Protocol (BGP)
Border Gateway Protocol (BGP) is the Internet’s dominant inter-domain routing protocol, and as such, it is a critical component of the Internet’s infrastructure. However, BGP, like any other technology, has flaws. The following are some of the most common BGP …
Border Gateway Protocol (BGP) in a nutshell
I have been busy writing some posts on some general topics for those readers who want some high-level overviews of various network terms and items. Border Gateway Protocol (BGP) is the core routing protocol used to exchange information about network …
The Mess we call BGP
Ever wonder why BGP seems to be such a complicated protocol to administer? It seems pretty straightforward to set up. Some commands, and you have a BGP session. Easy huh? BGP is one of those things where the more BGP …
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 …
Proper BGP DENY-ALL filter for mikrotik
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BGP, a single /24 and two diverse non-connected exit points
I am starting to see the following scenario more and more as IPv4 space is hard to get, but isn’t. With ARIN it is still possible to get an IPv4 allotment. Many smaller ISPs qualify for a /24 and can …