Recommendation on NTP appliances/devices
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. Thanks!
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
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).
On Thu, 3 Apr 2014, 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.
For some diversity you could try: - WWVB/CHU radio with a good indoor antenna into an appliance - CDMA, which yes is based on GPS, but tied with Rb oscillator can carry over any reception outages (CDMA or GPS) - Of course just setup an NTP server that peers to pool.ntp.org (but perphaps the least desirable) I've seen good results using the Endrun CDMA units as well as the WWVB units, both appliances and IPv6-enabled. Symmetricom does this too. wfms
participants (4)
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David Hubbard -
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Majdi S. Abbas -
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