On 19/06/17 22:10, Andreas Krüger wrote: > But I'm afraid of the "every 43200 seconds since boot" stuff, > too... > > I imagine a big city with many devices. Or maybe just a big > factory yard deploying thousands of little devices integrated > into heaven-knows-what, all with the same ntp client build > in. That client diligently follows the rule. It is a problem. In other areas. I don't know about the ntp pool.
I've seen 20 SIP phones bootup and take out the (not very good) DHCP server. Even a 10 msec of difference fixes the problem. A very simple work around to the "every 43200 seconds since boot" is to make it: "every 43200 + last byte of mac address seconds since boot" Thus there will be a spread of devices which connect between every 43200 seconds and every 43455 seconds. Thus if loads of devices come on at the same time, there is some separation on the second call home. (They will in theory, all come back together again, but takes a while) Tim _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
