In the same rack as the router we usually have two 48P PoE switches in a stack8ng configuration. Depending on the scale of the setup, we often have the same type of switches elsewhere, trunked in via 10gig fber. On rare occasions we have a bunch of extra fibers for which we use Aruba 3810 with only SFP ports.
We also have 100gig in use, but that’s only for a few closed off networks between the servers, with its dedicated Mellanox switch. While they do connect to the 10gig network via a breakout cable, the 100gig bandwidth is only needed internally in the cluster.