[170716] in North American Network Operators' Group
Re: Recommendation on NTP appliances/devices
daemon@ATHENA.MIT.EDU (William F. Maton Sotomayor)
Fri Apr 4 06:18:52 2014
Date: Fri, 4 Apr 2014 06:18:25 -0400 (EDT)
From: "William F. Maton Sotomayor" <wmaton@ottix.net>
To: David Hubbard <dhubbard@dino.hostasaurus.com>
In-Reply-To: <FCD26398C5EDE746BFC47F43EA52A17305A15EE4@dino.ad.hostasaurus.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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
