Re: [WIRELESS-LAN] Backup power

[Coehoorn, Joel]

In theory, we use UPS with all of our switch. In practice, while we always
have one when we deploy a new or replacement switch, the funding hasn't
been there for maintaining the batteries or replacing a UPS if it fails.



Joel Coehoorn
Director of Information Technology
402.363.5603
*jcoeho...@york.edu <jcoeho...@york.edu>*

*Please contact helpd...@york.edu <helpd...@york.edu> for technical
assistance.*


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On Thu, Jul 20, 2017 at 11:00 AM, Hales, David <dha...@tntech.edu> wrote:

> We size and install a UPS in every switch closet.  We have only a few
> models of switch and access point, so we built a spreadsheet to calculate
> our power load based on actual power draw observed in our lab.  We try to
> size our UPSes to provide a minimum of 15 minutes of uptime with 150% of
> their installed load.  That gives us enough headroom for adding switches to
> existing stacks, or adding other PoE devices down the road.  Based on a 5-6
> year replacement cycle, that sizing should be more than enough to keep up
> with any growth in load we might experience before the next cycle where we
> can resize for the load at that point in time.
>
>
>
> We keep our distribution and core on service contracts, but we use limited
> lifetime hardware warranty on our access switches.  We keep enough spares
> on hand to handle the troubleshoot and cross ship transition for any that
> fail.  Again, we only have a couple of models in production, so keeping
> spares on hand is a pretty low cost option.
>
>
>
> *David Hales*
>
> *Network Systems Administrator*
>
> *Information Technology Services*
>
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> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Sandra Bury
> *Sent:* Thursday, July 20, 2017 10:02 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Backup power
>
>
>
> Good morning -
>
>
>
> I would be interested to know how many of you include UPS purchases for
> switches in each network closet in your campus deployments. If you do not
> build in backup power, do you put your switches on a maintenance contract,
> or do you pay to replace them when they fail outside of warranty?
>
>
>
> Thanks very much.
>
>
>
> Sandy
>
>
> *Sandra H. Bury*
>
> Executive Director, Computing Services
>
> Information Resources and Technology
>
> Bradley University
>
> 309-677-2808 <(309)%20677-2808>
>
> sa...@bradley.edu
>
>
>
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