If I were to configure a Tertiary TFTP server via DHCP Option 150 for particular Voice VLANs, will the phones add the third TFTP server to their configuration file? Thanks.
Cisco Unified IP Phones use the option 150 value as the TFTP server IP address when Alternate TFTP option is set to No. You can assign only IP addresses as Option 150 values. A maximum of two IP addresses get used, and only the first two IP addresses that the DHCP server provides get accepted.
