Quick Tips for Better BGP

A while back I wrote some basic information on how to get started implementing¬†multi-homed internet using BGP. The details and configurations listed in that post are enough to get the connection up and running – but not quite in an ideal state. So today I want to share some…

Virtual Networking Contexts

I really want to take a moment to talk about how wonderful VRFs/firewall contexts really are. Both technologies essentially allow a network administrator to spin up a virtualized, isolated instance of a network device. I’ll be honest and say that I hadn’t had the chance…

BGP: Getting Started with Multi-homed Internet

A few years back I worked for an organization that had a single 100Mb Internet connection. Not bad for just typical corporate traffic, but we also hosted our production web site out of that location as well. An incident occurred where our website was down due to Internet issues during…

IP Address Design (Part 2)

Last week in IP Address Design (Part 1)¬†we discussed an example of a bad design for IP allocations and the problems that it caused. This week we will continue by discussing the proposed solution and how it resolved those issues. The problems with our IP Addressing scheme bothered me…

IP Address Design (Part 1)

It’s funny when you think about basic networking concepts and wonder if they will ever actually prove to be useful. Kind of like that “Do I really need to learn complex geometry? When am I ever going to use this?”. What I’m here to…