there is a dhcp server for a network with a lease time of 14 days. When I open the allocation, there are a lot of expired dhcp leases.
Doesn't the firewall automatically delete them?
Solved! Go to Solution.
Nope. The firewall will re-assign the entry if it needs to, but if that host connects again before the entry is re-used for someone else they'll still be assigned that address. Until absolutely necissary to assign the address to something else, it will display as you're currently seeing.
But what exactly does that mean?
currently, there are 96% used ip addresses.
Does the firewall reassign expired ip addresses to anonther host before 100% are used?
Essentially expired on the firewall means it can be assigned to another client if required. If the firewall never encounters a need to re-assign these addresses to a different client the client will always pull the same exact IP address.
So anytime the firewall runs out of addresses in a particular address pool, the server re-allocates the expired address to a different host. However to get this effect the address pool needs to be out of addresses. These 'expired' addresses will then be automatically released and assigned to the new clients.
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