Category:  Internet

The original Small Site Multihoming article has generated many responses, most of them being questions about the redundant implementation of the same principles. In this article, we’ll thus add a second customer router to add redundancy to the small site multi-homing design. The final design will still retain the administrative simplicity of the original solution – with no need to own public IP address space, autonomous system number, or to run Border Gateway Protocol (BGP).

In 2007, I wrote a series of articles describing an implementation of small-site (BGP-less) multihoming in the IPv4 world. It seems that this topic is still interesting, as I recently received requests to republish them, and it may (sadly enough) apply equally well to the IPv6 world.

This is the first article in the series. It describes a design with a single router using two uplinks to two upstream ISPs.