The high threshold for available free addresses in this
scope. If a cnrDHCPScopeFreeAddrLowThreshold event has
been generated for this scope, and the value for available
free addresses has exceeded the value of
cnrDHCPScopeFreeAddrHighThreshold, then a
ciscoNetRegFreeAddressHigh event will be generated. No
more ciscoNetRegFreeAddressHigh events will be generated
for this scope during this execution of the DHCP server
until the value for available free addresses becomes equal
to or less than the value of
cnrDHCPScopeFreeAddrHighThreshold.
This value may be expressed as either an absolute value
or a percentage; the units are specified by the value of
cnrDHCPScopeFreeAddrUnits.