Kenneth Porter wrote:
Assuming you're running ISC DHCP, the lease database is in /var/lib/dhcpd.
Yes, it's ISC DHCP, the standard version for Centos 6 so far as I know.
But as I initially wrote, "I've deleted all references to the old address in /var/lib/dhcpd/dhcpd.leases and restarted dhcpd." Still, ISC DHCP offers the same old address in response to discover. Where else does it remember that address?