No problem! The switches at the top are the edge routers; 7280QR-C36's. The switches in the middle are the spines; 7050QX-32S'. The switches at the bottom are the access switches, also 7050QX-32S'.
External connections from mostly transit providers plug in to these. Transit providers send us a table of all of the routes they know about. We aggregate those tables into one single table based on what the best (shortest) paths to the destination are. Because these tables can grow quite large (~1M for IPv4, ~400k for IPv6), you need a special device that can install all of them into a hardware ASIC.
1
u/m_vc 15d ago
Is the spine visible in the photos shown? Cant really see a difference between the switches