DHCP Options
Phones fetch their provisioning files from the IP address specified intftp-server-name. Example below is for ISC DHCP.subnet 192.168.75.0 netmask 255.255.255.0 {
authoritative;
range 192.168.75.16 192.168.75.254;
option routers 192.168.75.1;
option broadcast-address 192.168.75.255;
option tftp-server-name "192.168.75.1";
option ntp-servers 192.168.75.1;
}
An alternative to
tftp-server-name is the proprietary option 150 which allows for a list of IP addresses to be specified.option tftp-servers code 150 = ip-address;
subnet 192.168.75.1 netmask 255.255.255.0 {
...
option tftp-servers 192.168.75.1, 192.168.75.2;
}