nanog mailing list archives
Re: NTP question
From: James Harrison <james () talkunafraid co uk>
Date: Wed, 1 May 2019 23:27:38 +0100
On 01/05/2019 20:29, Job Snijders wrote:
The trick is to order a spot on the roof of the datacenter, have the facility staff place the antenna there, and run a cable to the NTP server in your rack.
Some DCs also offer GPS antenna feeds fed from a splitter, though it's important to get the total cable length from the antenna to your receiver so you can set your propagation delay offset accordingly. I've also been in facilities that distribute IRIG and 10MHz references so you can feed a reference directly, but that's fairly rare. It's worth asking what your facilities can provide, in either case. Many DCs don't want a dozen GPS antennae cluttering the roof up but are happy to provide the service from one they look after (for a cost, of course). If you have external facilities, of course, so long as you can run PTP/1588 back from them, you can always host your clocks there and distribute to 1588 masters in the DC. -- Cheers, James Harrison
Attachment:
signature.asc
Description: OpenPGP digital signature
Current thread:
- NTP question Mehmet Akcin (May 01)
- Re: NTP question Job Snijders (May 01)
- Re: NTP question James Harrison (May 02)
- Re: NTP question Mike Hammett (May 02)
- Re: NTP question James Harrison (May 02)
- Re: NTP question Bryan Fields (May 01)
- Re: NTP question Mehmet Akcin (May 01)
- Re: NTP question Brielle Bruns (May 01)
- Re: NTP question Andreas Ott (May 01)
- Re: NTP question Mike Hammett (May 01)
- Re: NTP question Brielle Bruns (May 01)
- Re: NTP question Mike Hammett (May 01)
- Re: NTP question Brielle Bruns (May 01)
- Re: NTP question Harlan Stenn (May 01)
- Re: NTP question Mehmet Akcin (May 01)
- Re: NTP question Job Snijders (May 01)