Re: [ntp:questions] GPS Weakness Could Sink Wireless

2013-12-13 Thread Terje Mathisen
Jan Ceuleers wrote: Interesting Light Reading article on the degree to which infrastructure (in casu wireless networks) is dependent on GPS timing signals, how little is needed to jam GPS (intentionally or otherwise), and what the impact of such jamming would be. It also talks about how PTP

Re: [ntp:questions] GPS Weakness Could Sink Wireless

2013-12-13 Thread Rob
unruh un...@invalid.ca wrote: On 2013-12-12, Rob nom...@example.com wrote: Jan Ceuleers jan.ceule...@computer.org wrote: Interesting Light Reading article on the degree to which infrastructure (in casu wireless networks) is dependent on GPS timing signals, how little is needed to jam GPS

Re: [ntp:questions] GPS Weakness Could Sink Wireless

2013-12-13 Thread Uwe Klein
John Hasler wrote: In any case designers of things like cell towers should no more assume that GPS is always just there than they should assume that electric power is always just there. This is a _basic_ shortcoming in CDMA as designed and in use. ( think of it as the NTSC of mobile phone

Re: [ntp:questions] NTP to multiple networks via one interface.

2013-12-13 Thread David Woolley
On 13/12/13 04:08, sc0tt.v3r...@gmail.com wrote: We have several VM's on this host on the same x.x.75.x network so we have set the xenserver to broadcast ntp (it syncs from network switches) and the VM's to be broadcast clients . NTP is working ok in this scenario. This sounds a horribly

Re: [ntp:questions] NTP to multiple networks via one interface.

2013-12-13 Thread Charles Elliott
I don't know much about VMs and nothing about xenserver, so beware of free advice. Here are three suggestions off the top of my head. 1. Would it be possible to have NTPD broadcast on both networks, x.x.75.x and x.x.75.x? 2. Under Windows it appears to be possible to bridge connections on a

Re: [ntp:questions] GPS Weakness Could Sink Wireless

2013-12-13 Thread John Hasler
I wrote: In any case designers of things like cell towers should no more assume that GPS is always just there than they should assume that electric power is always just there. Uwe writes: This is a _basic_ shortcoming in CDMA as designed and in use. ( think of it as the NTSC of mobile phone

Re: [ntp:questions] GPS Weakness Could Sink Wireless

2013-12-13 Thread Uwe Klein
John Hasler wrote: I wrote: In any case designers of things like cell towers should no more assume that GPS is always just there than they should assume that electric power is always just there. Uwe writes: This is a _basic_ shortcoming in CDMA as designed and in use. ( think of it as the

Re: [ntp:questions] NTP not syncing

2013-12-13 Thread Richard B. Gilbert
On 12/7/2013 7:35 PM, Magnus Danielson wrote: On 12/07/2013 11:39 PM, Harlan Stenn wrote: Magnus Danielson writes: The drift-file-accelerated lock-in isn't robust. Current behavior of response isn't very useful for most people experiencing it. I'm not sure I'd agree with the word most. It's