[54377] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Sun Dec 29 01:59:57 2002
From: "Stephen Sprunk" <ssprunk@cisco.com>
To: <ipdude@cattle-today.com>, <nanog@merit.edu>
Date: Sun, 29 Dec 2002 00:58:39 -0600
Errors-To: owner-nanog-outgoing@merit.edu
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
