Packets DownRange
Interconnection, peering, Data centers. How the Internet works. IXPs, transit, and other topics. Routing and Control Planes such as BGP and OSPF protocols. RPKI and IP resources are also covered.
Roses are red. Packets are neat. I’d reroute the whole internet Just to land at your IP. You’re my default gateway When my heart drops a route. No packet loss here Just love, end-to-end, absolute. If life were BGP And paths split in two, I’d set local-pref high So I always choose you. Our chemistry’s … Read more
How Internet Service Providers can use AI – the 10,000 foot level
An AS-SET is a collection of Autonomous System Numbers grouped under a single name. Rather than listing each ASN individually in your routing policy, you just refer to the set, and the routing registry handles the details. You can think of it like a mailing list for networks.
When you check out a BGP route, you’ll notice several attributes that help routers decide which path to use. The Origin code is one of the simplest and is often overlooked
When your enterprise runs applications that customers or employees rely on every day, speed matters. A slow app can mean lost productivity, frustrated users, and even lost revenue. One way enterprises can improve application performance is through peering.
In this post, I will dive into what the no_export attribute is, how it works, and when you should use it.
Whether you’re a network engineer preparing for a cross-connect, an IT pro inspecting your new rack space, or a client touring a colocation facility, knowing what to expect can help you make the most of the visit.
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 content, you must be a member of Justin’s Patreon at $3 or more Unlock with … Read more
In this post, I walk through some key quirks and common pitfalls you might encounter when configuring BGP on MikroTik RouterOS (v6 & v7), Cisco IOS, Juniper Junos, and Arista EOS.
I have created a series of example configurations, a commented PDF, and a Juniper .set for configuring BGP on Juniper routers. This post is available for my Patreon folks here.
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 content, you must be a member of Justin’s Patreon at $15 or more Unlock with … Read more
Border Gateway Protocol (BGP) filtering is critical for securing and optimizing internet routing. Improper BGP configuration can lead to serious issues like route leaks, hijacks, or suboptimal routing. Here are the most effective best practices for BGP filtering: 1. Prefix Filtering Objective: Ensure only authorized prefixes are advertised or accepted. 2. AS-PATH Filtering Objective: Prevent … Read more