I have 3 IP blocks and 3 Cisco Switches. Each switch has its own IP block - 10.45.100.0/24, 10.45.101.0/24 and 10.45.102.0/24 I have got a PC on 10.45.100.0/24 block. I can wake up whole computers ...
At one location we have a single server (also a DHCP server) and much less than 254 clients. Many are wired, but there are also a couple of wireless routers, which occasionally have their wired ports ...