best practice for fixed-address / reserved leases

Simon Hobson dhcp1 at
Mon Jan 4 09:06:10 UTC 2021

Glenn.Satchell at wrote:

> One other alternative to a reserved lease (which is essentially infinite time) could be to set a very long lease, say a few months or 1 year - just make it a longer than any amount of time the system might be not on the network.


> The other advantage here is that if the device is permanently removed from the network, eventually the lease will expire and be available for re-use by other systems.

That's a neat idea, never thought of that.

But if a client releases it's lease (e.g. on shutdown), doesn't that break the idea by setting the lease to free ? Or does it retain it's "year in the future" end time and thus go a long way down the list of leases when it comes to finding a free one for a new client ?


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