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.
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-subscribed. 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.
On Mon, Jun 27, 2016 at 5:26 PM, Tom Hill <tom@ninjabadger.net> wrote:
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
Way too much, is the simple answer.
I did have a 7604 (non-S) with the same PSUs, 1x SUP720-3BXL, 1x WS-X6724-SFP and 1x WS-X6708-3CXL was drawing near 2kW.
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.
Cisco do also have a power calculator, too. It's conservative but not overly so:
http://cpc.cloudapps.cisco.com/cpc/launch.jsp
-- Tom