I have a client that needs to extend the number of IP addresses for their guest wireless, on Sundays they have more than 250 people trying to connect to it. They would like to have as many as 800 available IP's. Is it as simple as changing the subnet from 255.255.255.0 to 255.255.0.0 ?
They currently have a Linksys WRT610N router which is connected to the main router with a VLAN connection. Because of the physical layout it would be very difficult to add another router.
I have told them that it's likely with 800 connected they won't have bandwidth to do anything but they want to try it anyway.