MX960 is different than MX480 and MX240 WRT the power requirements, it also differs for high power stuff (All newer chassis) IIRC. Two zones, not one big zone, two 1+1 redundant zones, PEM 0/2 and 1/3.
Zoning or no zoning depends on your *chassis* not your PSUs. On Thu, Mar 5, 2015 at 7:30 AM, Tom Storey <t...@snnap.net> 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. > > On 5 March 2015 at 13:01, Kevin Wormington <kw...@sofnet.com> wrote: > >> That's right the power zones are only for DC power. AC has only one zone, >> but according to the link below 2 high line AC supplies are mandatory and 3 >> low-line. I guess it might come up on a single high line depending on what >> line cards you have. >> >> http://www.juniper.net/documentation/en_US/release- >> independent/junos/topics/reference/specifications/calculating-power- >> requirements-mx480.html >> >> >> On 03/05/2015 12:48 AM, Mark Tinka wrote: >> >>> >>> >>> On 4/Mar/15 18:21, Kevin Wormington wrote: >>> >>>> I don't have any experience the the large EXs, but is there a chance >>>> you don't have enough power to the chassis to bring the line cards >>>> online? I know the larger MXs require a certain number of supplies and >>>> IIRC certain supplies power certain slots. So if you just have one >>>> supply plugged into 120VAC it may not bring the line cards online. >>>> >>> >>> For the MX routers, I think this is only if you run DC or the AC low >>> power units (i.e., 120VAC). >>> >>> IIRC, a single 240VAC PSU on an MX should be able to drive an entire MX >>> chassis, non? >>> >>> Mark. >>> _______________________________________________ >>> juniper-nsp mailing list juniper-nsp@puck.nether.net >>> https://puck.nether.net/mailman/listinfo/juniper-nsp >>> >>> _______________________________________________ >> juniper-nsp mailing list juniper-nsp@puck.nether.net >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp -- "Genius might be described as a supreme capacity for getting its possessors into trouble of all kinds." -- Samuel Butler _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
