[j-nsp] Activating FPC's on an EX8208

[Mark Tinka]

On 5/Mar/15 17:30, Tom Storey wrote:
> Interesting, Ive got a couple of MX960's with high line AC PEMs in front of
> me, and if I only turn one of them on, I only get half a router powered up.
> As far as I know, there is still zoning with high line AC PEMs.
>
> PEM0 and PEM2 supply one half of the router (slots 0-5 and RE0 and one fan
> tray), and PEM1 and PEM3 the other half (RE1 and slots 6-11 and the other
> fan tray) - as I understand it.
>
> So we do PEM0 and PEM1 as A feeds and PEM2 and PEM3 as B feeds, therefore
> if you lose A or B the router keeps running with all slots.
>
> So 2 may be mandatory, but you have to do one for each zone.
>
> Smaller boxes like MX240 we can power entirely with a single PEM.

Thanks for the feedback, Tom.

My tests were on an MX480, IIRC.

So it's likely that an MX960 would need more power.

Mark.