You&#x27;re not alone in finding the post confusing.<p>For me the TL;DR would be: Our edge nodes originally had full BGP tables from our upstreams. This was good as our nodes care about path selection. When we needed to scale, we didn&#x27;t want to use a pair of (expensive) routers, because we didn&#x27;t actually need routing, but our upstream were not happy about having to peer to more than a pair of devices. We bought some switches, reflected BGP routes to the nodes, and had to hack L2 connectivity between the switch and the nodes.<p>Also, using FIB to describe RIB irks me.