22.16.15. Configuring the Time-to-Live for NTP Packets

To specify that a particular time-to-live (TTL) value should be used in place of the default, add the following option to the end of a server or peer command:
ttl value
Specify the time-to-live value to be used in packets sent by broadcast servers and multicast NTP servers. Specify the maximum time-to-live value to use for the expanding ring search by a manycast client. The default value is 127.