Re: [j-nsp] MX960 PEMs and 3 phase power
On 3/22/23 17:27, Tom Storey via juniper-nsp wrote: Hi all. I had this idea in my head that MX960 power supplies should not be split across phases, but I cant find anything in any documentation that says that. Can anyone comment on whether multiple phases per PEM are supported, or whether its even a reasonable idea to put into practice? My thought is one PEM on one phase, such that if that phase drops, you drop that PEM entirely. Or is it worthwhile spreading across phases to keep even half of a PEM alive and supplying the chassis? I can't think of any plausible reason why this would not work, but it sounds awfully complicated. If you are in a typical data centre, all your power is going to come from at least one UPS anyway, maybe even two. So not sure you need to worry about this. Mark. ___ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
Re: [j-nsp] MX960 PEMs and 3 phase power
On 23/3/23 2:27 am, Tom Storey via juniper-nsp wrote: My thought is one PEM on one phase, such that if that phase drops, you drop that PEM entirely. Or is it worthwhile spreading across phases to keep even half of a PEM alive and supplying the chassis? Start by going back to "if that phase drops", depending on where you are and how much load you present using any non-trivial amount of power may not be acceptable. Then even consider if loss of a single phase is even a plausible outage that isn't going to mean a full loss right afterwards. ___ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
Re: [j-nsp] MX960 PEMs and 3 phase power
Depending of your setup, all our COs are setup to provides A+B feed. Which include TS, UPS and Bypass. PS: Be sure to test before putting it in production, the PEM #, and its assignment into the chassis, are not that straight forward. - Alain hebertaheb...@pubnix.net PubNIX Inc. 50 boul. St-Charles P.O. Box 26770 Beaconsfield, Quebec H9W 6G7 Tel: 514-990-5911http://www.pubnix.net Fax: 514-990-9443 On 3/22/23 11:27, Tom Storey via juniper-nsp wrote: Hi all. I had this idea in my head that MX960 power supplies should not be split across phases, but I cant find anything in any documentation that says that. Can anyone comment on whether multiple phases per PEM are supported, or whether its even a reasonable idea to put into practice? My thought is one PEM on one phase, such that if that phase drops, you drop that PEM entirely. Or is it worthwhile spreading across phases to keep even half of a PEM alive and supplying the chassis? Thanks ___ juniper-nsp mailing listjuniper-...@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
[j-nsp] MX960 PEMs and 3 phase power
Hi all. I had this idea in my head that MX960 power supplies should not be split across phases, but I cant find anything in any documentation that says that. Can anyone comment on whether multiple phases per PEM are supported, or whether its even a reasonable idea to put into practice? My thought is one PEM on one phase, such that if that phase drops, you drop that PEM entirely. Or is it worthwhile spreading across phases to keep even half of a PEM alive and supplying the chassis? Thanks ___ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
