DHCP Release Message (proposal)
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pfSense does not send DHCP release message to the DHCP server to actually release the address.
pfSense merely brings it down locally. Doesn't even remove the address from it's leases database. So renewal will request the same address again.PR
Status / Interfaces - Relinquish DHCP Lease
https://github.com/pfsense/pfsense/pull/3390 (2.4)
https://github.com/pfsense/pfsense/pull/3391 (2.3)Old Threads:
DHCP Release Incomplete (Status: Interfaces)
https://forum.pfsense.org/index.php?topic=52608DHCP Release does not work correctly
https://forum.pfsense.org/index.php?topic=108181Redmine Reports:
Releasing DHCP on WAN interface should send a release
https://redmine.pfsense.org/issues/4209
01/13/2015DHCP release does not send proper DHCP Release packet to DHCP server
https://redmine.pfsense.org/issues/6070
04/04/2016
duplicate of #4209