[Nut-upsuser] Why are LAN ports not standard on UPSs these days?

Philip Rhoades phil at pricom.com.au
Sun Jun 25 14:52:39 UTC 2017


On 2017-06-25 23:26, Larry Fahnoe wrote:
> Hi Phil,
> I don't have an answer to your question about the lack of LAN ports,

I think it is weird - with everything else being connected to LANs like 
fridges etc . . why not UPSs?

> but can offer my experience with NUT for a home server environment.
> I've tended to prefer the Tripp-Lite UPS systems, mainly because I
> originally felt they did a good job of power filtering.  I use a NUT
> master running on a Raspberry Pi 3 which is easy to maintain and gets
> current updates via its Debian roots.

Ah . . another good reason to get a RPi going . .

> I have two environments, one
> with a much older UPS which has only serial, but the addition of a
> tiny card with a MAX3232 level-shifter
> https://www.sparkfun.com/products/11189 allows the RPi to communicate
> nicely, the second environment uses a USB connection from the RPi to
> the UPS.  Both work very well with NUT, and then communicate with NUT
> clients on the other systems.  I like that the RPi allows me to
> separate the NUT master function from the main virtualization hosts,
> currently CentOS/KVM in this case.

Yes, good idea . .

> The real key is to ensure NUT supports the UPS, and then from there an
> effort to use currently supported versions of NUT on a platform which
> is receiving updates & life is quite good.

Yes, good point - which is why I came here!



> --Larry
> On Sun, Jun 25, 2017 at 7:53 AM, Philip Rhoades <phil at pricom.com.au>
> wrote:
>> People,
>> A couple of decades before I was retired and was still working for
>> other people I had cause to install UPSs and they usually had RS232
>> ports to allow the setting up of shutdown scripts to UNIX / Linux
>> servers.  Now, after not having to be concerned by those issues for
>> some time - most of my little web sites have been on Digital Ocean
>> or other suppliers VMs for a long time - I am shutting down my DO
>> servers and bringing my sites in-house.  However, now I need to be
>> concerned about reliable power again so I have spent a bit of time
>> looking at options and I don't understand why most of the UPS
>> offerings available do not come standard with a LAN port?  Why is
>> this?
>> Do people have suggestions about my options?  I have two main
>> machines - say 250-400W total and a few small devices inc a Billion
>> router and some USB devices.  It would be nice to have at say 5-10
>> minutes battery backup before sending shutdown messages to the Linux
>> machines.
>> Thanks,
>> Phil.
>> --
>> Philip Rhoades
>> PO Box 896
>> Cowra  NSW  2794
>> Australia
>> E-mail:  phil at pricom.com.au
>> _______________________________________________
>> Nut-upsuser mailing list
>> Nut-upsuser at lists.alioth.debian.org
>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
>> [1]
> --
> Larry Fahnoe, Fahnoe Technology Consulting, fahnoe at FahnoeTech.com
>            Minneapolis, Minnesota       www.FahnoeTech.com [2]
> Links:
> ------
> [1] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
> [2] http://www.FahnoeTech.com

Philip Rhoades

PO Box 896
Cowra  NSW  2794
E-mail:  phil at pricom.com.au

More information about the Nut-upsuser mailing list