--dhcp-sequential-ip
Dnsmasq is designed to choose IP addresses for DHCP clients using a
hash of the client's MAC address. This normally allows a client's
address to remain stable long-term, even if the client sometimes allows its DHCP
lease to expire. In this default mode IP addresses are distributed
pseudo-randomly over the entire available address range. There are
sometimes circumstances (typically server deployment) where it is more
convenient to have IP
addresses allocated sequentially, starting from the lowest available
address, and setting this flag enables this mode. Note that in the
sequential mode, clients which allow a lease to expire are much more
likely to move IP address; for this reason it should not be generally used.