[c-nsp] power requirement for WS-X614E-GE-45AT in reverse POE mode

[George Giannousopoulos]

Hi Gert,

I have to admit your "workaround" came as a shock to me :)
I can't help you on that, but I really wonder..

Even if it eventually works, will you trust it on your production network?
Maybe it's ok for 1-2 days, but can you rely on that?
What if a POE+ injector fails?

Personally, in such an urgent, I'd try to get a redundant power supply from
another similar chassis..

--
George



On Wed, Apr 1, 2015 at 10:38 AM, Gert Doering <gert at greenie.muc.de> wrote:

> Hi,
>
> quick question, because I cannot find the answer on cisco.com.
>
> If I run a WS-X6148E-GE-45AT in reverse POE mode (feeding power into
> the 6500), but do not use the ports for actual switching, will the line
> card still require power?
>
> Background: I urgently need a few 10GE ports in a location, and have a
> spare 6504 chassis, Sup720 and 6704-10GE lying around, but no power
> supplies,
> so we decided to power the chassis by using 20 POE+ injectors, feeding
> 30W each (= 600W in total) into a WS-X6148E-GE-45AT POE+ capable line card.
>
> This is just enough to power Sup720-3B (280W) and 6704-10GE (295W), but
> not enough if the 6148E also needs power for itself in that configuration.
>
> Adding more POE+ injectors could be done, but would be somewhat of a hassle
> as we only have 20 on-site, and the cabling gets even harder to manage if
> we need to add more POE+ injectors...
>
> thanks for your advice,
>
> gert
> --
> USENET is *not* the non-clickable part of WWW!
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> Gert Doering - Munich, Germany
> gert at greenie.muc.de
> fax: +49-89-35655025
> gert at net.informatik.tu-muenchen.de
>
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