Ryan,
We are currently running the Even VLAN pooling algorithm. I agree that it distributes IP addresses quite nicely. In our enviornement we have 3500 clients average daily in a even VLAN pool with (7) /22 networks. I most definitely like the fact that I dont have to worry about running out of IP addresses with this deployement.
But we are having an issue currently. With the Even VLAN algorithm turned on as clients roam from AP to AP we have noticed that sometimes the clients will switch VLANs during the roam. The client will often show a disconnect and then the user will have to disconnect and reconnect in order to reestablish the network connection.
We are able to help the issue by enabling the preserve-VLAN setting but we are still seeing the issue from time to time.
We would like to use the Hash algorithm because the client will keep its same IP address while roaming. With our current design we are affraid to turn on the hash algorithm though because we think there is a good possibility we could overrun one of the /22 DHCP network scopes because of the uncertainty of the Hash pooling algorith.
Have you seen any issues like this in your deployment?
If you have do you have any suggestions?
Thank you!