From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: steve@erayd.net Received: from krantz.zx2c4.com (localhost [127.0.0.1]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id a5eb7f84 for ; Wed, 16 May 2018 20:31:56 +0000 (UTC) Received: from mail-yw0-x229.google.com (mail-yw0-x229.google.com [IPv6:2607:f8b0:4002:c05::229]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 79c1ef7c for ; Wed, 16 May 2018 20:31:56 +0000 (UTC) Received: by mail-yw0-x229.google.com with SMTP id q7-v6so653705ywd.9 for ; Wed, 16 May 2018 13:32:19 -0700 (PDT) MIME-Version: 1.0 References:

<793381ba-b59d-50e4-6d7b-cbe9bef91ba1@cgws.de> <489c2f57-574a-1223-9c4d-266904e52c94@gmail.com> <20180515202126.yw57deh6st5ebnk6@kowloon> <20C72316-B8FC-4515-8DC8-8BC82BF3864F@cgws.de> In-Reply-To: <20C72316-B8FC-4515-8DC8-8BC82BF3864F@cgws.de> From: Steve Gilberd Date: Thu, 17 May 2018 08:32:06 +1200 Message-ID: Subject: Re: Need for HW-clock independent timestamps To: Axel Neumann Content-Type: multipart/alternative; boundary="0000000000007ae724056c589db5" Cc: wireguard@lists.zx2c4.com List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0000000000007ae724056c589db5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable > $20 would increase the HW cost of many typical community-networks (CN) deployments significantly. This seems unlikely. In most cases, $20 is notably less than the cost of a single node. > Plus requiering more knowledge, maintenence, and power supply for sometimes solar-powered setups... no USB. If that's a concern, then put the GPS on nodes where those constraints aren't a problem. You only need GPS on a few nodes (or one node if you don't care about redundancy). Most nodes will get by just fine with just plain NTP, and can happily fetch their time from the GPS nodes, or from other non-GPS nodes with a correct time sync. > It is really NOT as simple as it sounds to plug a $20 GPS !!! It's not particularly complicated either. The actual setup of the devices isn't particularly difficult, and you're already touching these nodes to set up wireguard on them, so "I have to touch the config" isn't a barrier in this case. Cheers, Steve --=20 Cheers, *Steve Gilberd* Erayd LTD *=C2=B7* Consultant *Phone: +64 4 974-4229 **=C2=B7** Mob: +64 27 565-3237* *PO Box 10019, The Terrace, Wellington 6143, NZ* --0000000000007ae724056c589db5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable > $20 would increase the HW cost of many typical community-networks (CN)= deployments significantly.

This seems unlikely. In most= cases, $20 is notably less than the cost of a single node.

> Plus requiering more knowledge, main= tenence, and power supply for sometimes solar-powered setups... no USB.

If that's a concern, th= en put the GPS on nodes where those constraints aren't a problem. You o= nly need GPS on a few nodes (or one node if you don't care about redund= ancy). Most nodes will get by just fine with just plain NTP, and can happil= y fetch their time from the GPS nodes, or from other non-GPS nodes with a c= orrect time sync.

> I= t is really NOT as simple as it sounds to plug a $20 GPS !!!

It's not particularly complicated= either. The actual setup of the devices isn't particularly difficult, = and you're already touching these nodes to set up wireguard on them, so= "I have to touch the config" isn't a barrier in this case.

Cheers,

Steve

--

Cheers,

Steve Gilberd
Erayd LTD=C2=A0=C2=B7=C2=A0Consultant
Phone: +64 4 974-4229=C2=A0=C2=B7=C2=A0Mob: +64 27 565-3237
PO Box 10019, The Terrace, Wellington 6143= , NZ

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