Service IronWare Administration Guide (Supporting R05.6.00) User Manual

264 Multi-Service IronWare Administration Guide
53-1003028-02
How NTP works
7
NTP broadcast client
An NTP broadcast or multicast client listens for NTP packets on a broadcast or multicast address.
When the first packet is received, it attempts to quantify the delay to the server in order to better
quantify the correct time from later broadcasts. This is accomplished by a series of brief
interchanges where the client and server act as a regular (non-broadcast) NTP client and server.
Once these interchanges occur, the client has an idea of the network delay and thereafter can
estimate the time based only on broadcast packets.