Thus spake ip dude <ipdude@cattle-today.com>:
Hello NANOG group. I am trying to make a case for using DC power supplies versus AC power supplies for typical IP networking equipment. Is there any published whitepapers detailing this subject? Do you have any suggestions to aide my argument?
Most of the argument depends on the facility you're in. Assuming you're asking as an end-customer: DC requires clue from your staff when installing/removing equipment, and this means safety training at a minimum. Power choice also affects your equipment purchasing: DC versions of gear are often priced higher, and gear not intended for telcos/ISPs may not have a DC option available at all. OTOH, many colos -- especially ones run by telcos -- don't provide AC UPS. If you want AC UPS in these environments, you'll have to provide your own, which is expensive, bulky, and a maintainance burden. If you're building your own datacenter, please specify that and I'm sure you'll get a whole different discussion :) S