On 04/04/14 10:16, Majdi S. Abbas wrote: > On Thu, Apr 03, 2014 at 06:55:02PM -0400, David Hubbard wrote: >> Anyone have recommendations on NTP appliances; i.e. make, model, gps vs >> cell, etc.? Roof/outdoor/window access not available. Would ideally >> need to be able to handle bursts of up to a few thousand simultaneous >> queries. Needs IPv6 support. > > Without roof access I'd suggest CDMA instead of GPS: > > http://www.endruntechnologies.com/ntp-server.htm > > Appears to fit your requirements. > > --msa >
The downside of CDMA is it's going to live until Verizon & Sprint can get enough of their customers migrated to LTE. It really depends on how accurate you need to be. If you only want <10ms accuracy but stable (It's trivial to get all clients better than 1ms) then grab three to five old servers (or new low-power ones), and just put ntpd on them, pointing at some nearby upstreams. If it *must* be an appliance the Symmetricom units are nice, and support IPv6 (have done for years).