Why Your Traffic Didn’t go the way you expected

3 Mintue read timeJustin Wilson PacketsDownRange A common problem I run into when diagnosing route issues is traffic not going across the path it’s supposed to. An established BGP session only means the routers successfully exchanged routes. It says nothing about which route your router actually installed in the forwarding table. Let’s get into some … Read more

Understanding BGP Route Types: Full Routes vs Partial vs Default vs Customer Routes

5 minute read time.Justin Wilson j2sw.com When you configure a BGP session, one of the first questions is what routes you actually want to receive.  If you have ever filled out a questionnaire with Hurricane Electric or another transit provider, they ask you what “kind” of routes you want.  In this article, I plan to … Read more

Useful Python Libraries Every Network Engineer Should Know

A Python script usually spends very little time doing actual Python work. Most of the actual work comes from libraries that know how to connect to network devices and do the work. They interact with APIs. Once you understand what each library does, you can spend less time writing code and more time solving network … Read more