Environment : Following controller's 6XX, 3XXX, M3 and 72XX running 6.3.X.X
6XX, 3XXX, M3 and 72XX controllers running 6.3.X.X, we could only have limited number of pools created as per platform limits. If we try to surpass the limit, it will through the error "Failed to add pool" which is expected. As shown below, on a 3600 controller, we already have 506 leases created and its limit is 512 leases.
If we try to add big DHCP pool, it will throw the error which is an expected behavior.
However for the remaining leases, we could have small scopes created to make full use of 512 leases.