Req 4.4 - Clients refusing offers
As administrator I want to be able to see per server which clients are declining offers by subnets. (this is a possible indication that there are duplicate ip addresses out there)
If we are fairly sure the reason is an IP address conflict, it would be good to label this in the UI as IP address conflicts. Perhaps later on we would also like to see offers not responded to. This is an indication of a misconfiguration and is useful for troubleshooting.