--dhcp-optsfile=<path>
Read DHCP option information from the specified file. If a directory is given, then read all the files contained in that directory in alphabetical order. The advantage of using this option is the same as for --dhcp-hostsfile: the --dhcp-optsfile will be re-read when dnsmasq receives SIGHUP. Note that it is possible to encode the information in a --dhcp-boot flag as DHCP options, using the options names bootfile-name, server-ip-address and tftp-server. This allows these to be included in a --dhcp-optsfile.