To edit the NTP broadcast configuration:
Enter the IP MASK in dotted decimal notation.
Enter a KeyID from 1 to 65534.
Select 16, 32, 64, 128, 256, 512, or 1024 (multicast packet rate in seconds) from the RATE drop-down box.
Select 0 through 7 from the TTL drop-down box (packet Time-To-Live; the number of hops used for broadcast mode).
Select NO CHANGE, ADD, MODIFY, or DELETE in the drop-down box.
Click OK to accept the changes and return to the Monitoring Configuration screen, or Cancel to return to the Monitoring Configuration screen without saving the changes.