Packets DownRange
Welcome to the first Packets Down Range of 2026. Lots of things happening in the world on The Capital I Internet. So grab your multi-tool, fire up your terminal, and let’s head down range.
Many Internet service providers believe PeeringDB is just for networks in large data centers. That belief sticks around like an old patch cable at the bottom of a toolbox. The reality is simpler: every ISP should have a PeeringDB entry, even if you never set foot in a carrier hotel, IXP, or meet-me room. Your … Read more
Add support for BGP and OSPF routing via frr (Settings->Networks->Routes->Dynamic Routing
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
In this post, I will dive into what the no_export attribute is, how it works, and when you should use it.
The following is a Template for creating a BGP session with both a v6 and a v4 peer in Mikrotik RouterOS v7. It costs $15 for Patreon subscribers or $20 for everyone else.
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
ISP-specific training focuses on the unique challenges and technologies Internet Service Providers face. Unlike general networking or CompTIA-style certifications, this type of training zeroes in on real-world field scenarios
BFD is a protocol designed to rapidly detect link or path failures between two forwarding engines. It operates independently of routing protocols but works in conjunction with them to improve failure detection and response times.
Podcast: Play in new window | Download (68.6MB)
Border Gateway Protocol (BGP) is a protocol that makes the Capitl I Internet run. It is the fundamental system that Internet Service Providers (ISPs) and large networks use to exchange reachability information and ensure data finds its way across the complex web of networks making up the global Internet.