Hi I'd like to estimate the amout of BGP route traffic in our proposed network. Are there any case studies of bandwidth usage of the BGP protocol out there?

Specifically, the network we are planning will include 20-100 routers talking BGP to a routeserver that is connected to an ISP.

I'd appreciate any help you can provide.

Generally, we would need to know the precise architecture of your network (what are you doing for IBGP distribution? How many interconnects? Who are you peering with? ...) to answer the question in any meaningful way. And then, the result is likely to be that the bandwidth is negligable. Tony