[j-nsp] EX3200 Power supplies

[Emil Katzarski]

Hi all,

I was also surprised when I first read this.
It actually means that if you connect redundant power system you can
replace the AC power supply. There is a separate external DC power supply
for redundant power for these switches.


On Sat, Jul 27, 2013 at 11:08 AM, Julien Goodwin
<jgoodwin at studio442.com.au>wrote:

> On 26/07/13 01:52, Doug McIntyre wrote:
> > On Thu, Jul 25, 2013 at 09:01:15AM -0400, Paulhamus, Jon wrote:
> >> Power Supply in EX3200 Switches
> >> The power supply in EX3200 switches is a hot-removable and
> hot-insertable field-replaceable unit (FRU) that you can install on the
> rear panel without powering off the switch or disrupting the switching
> function. The power supply in EX3200 switches is not redundant.
> >>
> >>
> >> Does that mean if I pull a power supply out, the switch stores enough
> power to stay running long enough to put the new one in and get powered up?
> >
> >
> > What odd wording, since the EX3200 doesn't have two power supply slots.
> > They probably took wording from the EX3300/EX4200 which do have two power
> > supply slots, and which probably uses the same power supplies.
> >
> > The EX3200 does have an RPS power port, so most likely what they
> > intend to mean are that with the optional RPS deployed, and your main
> > supply fails, you can hot swap it at that point, while running on RPS
> power.
> >
> > And then deal with the oddities of running on RPS power.
> >
> > But no, it won't keep running if you pull the single power supply out.
>
> The EX[34]200's do seem to have a lot more reserves when you pull power
> than most kit. I actually wouldn't be surprised if you could manage to
> do this, although doing it without crashing the cpu or forwarding chips
> is a bit less likely.
>
> If course if you want to do this the power supply has already failed
> making this an academic concept only.
>
>
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