We have a network setup for a demo, which lasts about 15mn. Our DHCP server is configured to assign ~ 100 addresses (max number of simultaneous connections or our AP) ... but since people might come and go very quickly we need to keep the lease time very short in order to free the IP addresses and allow other people to connect.
Initially I wanted to go for a lease time as short as 25 seconds, considering that the demo is quite short, and to be sure that no IP will be "abusively" reserved by the DHCP server ... However, I am afraid of several things.
First, the impact on the load of the network.
Second, I have read here and there that there might be some "weird" issues with time leases below 1 minute (e.g. What is a good DHCP lease timeout configuration).
Does somebody know what can be the different problems with using such a short time lease? What is the impact on the network? What would be a short but safe lease duration to use?