How to calculate the required power of the router?

Question

network hardware

1. How to calculate the required capacity of a border router, given:
   
   • network bandwidth 100 Mbps
     
   • number of nodes in the network - 50 pcs.
     
2. And if you add VPN IPSec over GRE tunnel over a 100 Mbps channel and there are 50 more nodes in that network?
   

Answer 1

The first point says nothing at all about the load
. If the second point is perceived as "VPN IPSec up to 100 Mbps", then a very serious piece of iron is needed.
Try to better define the requirements or immediately look for throughput tests.
Let me explain. The number of "nodes in the network" says nothing about the load on the equipment. Is that very approximately and indirectly. For a slightly more accurate assessment, we need channel loads in bps and pps. The presence / type of encryption also greatly affects if this functionality also lies on the router.