[190349] in North American Network Operators' Group
Re: Real world power consumption of a 7604-S or 7606-S
daemon@ATHENA.MIT.EDU (joel jaeggli)
Tue Jun 28 01:37:29 2016
X-Original-To: nanog@nanog.org
To: Eric Kuhnke <eric.kuhnke@gmail.com>, nanog@nanog.org
From: joel jaeggli <joelja@bogus.com>
Date: Mon, 27 Jun 2016 22:37:20 -0700
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From: joel jaeggli <joelja@bogus.com>
To: Eric Kuhnke <eric.kuhnke@gmail.com>, nanog@nanog.org
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Subject: Re: Real world power consumption of a 7604-S or 7606-S
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<5771C426.2030700@ninjabadger.net>
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On 6/27/16 5:35 PM, Eric Kuhnke wrote:
> Yes, very much agreed, part of the reason why I'm looking to do the
> watts per linecard calculation is to illustrate how it's not healthy
> except in certain places. As an edge aggregation device in a very
> small city in a rural western US state where the electricity is 6
> cents/kWh, the 24x7 load from a 7604 that eats 950W with supervisors
> and a 6724SFP linecard is not so terrible. In this case the colo
> space for a 42U rack is sometimes literally free.
>=20
> In a IX point/datacenter/colocation environment where rack and power
> costs real money, not so much.
2 x ( 4 x 10Gig) linecards is really as fast as it goes no over-subscrib=
ed.
It's been rather a long time or possibly never since that platform was
cutting edge on a PPS/Watt basis.
Today at roughly double the power consumpution per slot you can have
between 16 and 36 hundred gig ports or 48 x 10gig at half the power
consumption.
>=20
> On Mon, Jun 27, 2016 at 5:26 PM, Tom Hill <tom@ninjabadger.net>
> wrote:
>=20
>> On 28/06/16 00:26, Eric Kuhnke wrote:
>>> Example: 7604S chassis with dual 2700W DC power - chassis and
>>> fans use how much power? 2 x RSP720-3CXL at 310W each WS-X6704
>>> with DFC4 - ???W each
>>=20
>> Way too much, is the simple answer.
>>=20
>> I did have a 7604 (non-S) with the same PSUs, 1x SUP720-3BXL, 1x=20
>> WS-X6724-SFP and 1x WS-X6708-3CXL was drawing near 2kW.
>>=20
>> It's not healthy, please consider how much you'll spend in
>> electricity vs. something else. For example, the ASR9001 uses a 5th
>> of the power.
>>=20
>>=20
>> Cisco do also have a power calculator, too. It's conservative but
>> not overly so:
>>=20
>> http://cpc.cloudapps.cisco.com/cpc/launch.jsp
>>=20
>> -- Tom
>>=20
>=20
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