We have A+B power delivered 3 phase to the racks, broken out on PDUs, but I think I must have been thinking about another platform in regards to not splitting PSUs across phases.
Thanks! On Thu, 23 Mar 2023, 09:15 Mark Tinka via juniper-nsp, < juniper-nsp@puck.nether.net> wrote: > > > On 3/23/23 10:29, Gert Doering wrote: > > > "typical" data centres over here have 2 primary feeds, either one > > with UPS and one with generator, or both with (different) UPSes - but > > depending on the load drawn by a rack, might be presented as multiple > > circuits with 16A each, and individual circuit breakers. > > Same here, and also what we have seen at most of the larger data centres > we work with. > > > > Now, if another device next to your MX960 has a PSU failure and kicks > > one of the circuit breakers, what do you want your MX960 to do... as > > well, what do you want to happen if the UPS fails, and one of the primary > > feeds goes down. > > We typically deploy a full power complement in all our routers to > protect against issues such as these, even when we may not necessarily > need all that power Day 1. > > > > We do not have MX960s, but we did have other devices with 3 PSUs that > > needed 2 to fully power all line cards, and this was quite a bit annoying > > - "it says redundant PSUs, but no full feed A / feed B resiliency"... > > Even with the 2nd generation high-capacity AC power supplies, the MX960 > requires at least 2 power supplies at a minimum, to power the 2 zones in > the system. > > These power supplies have 2 receptacles per unit, to allow you to drive > a full chassis running at speed with just 2 of them in the box. > Otherwise, with just a single receptacle per power supply, you only get > about half of the energy out of the power supply. > > 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