I'm trying to find info regarding the power consumption of a CRS. However I cannot find any information about the following CRS modules (no datasheet):
Any idea of where can I find this info?
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Thanks for your reply!!!! I notice a very big difference between FC and FC140... Nice to see that contrary to the PLIMs/MSCs/FPs, the power consumption is lower in the new FCs.
the lower consumption is simple to explain. In the FC/S we used to have 3 ASICs for each fabric stage (S1, S2 and S3) per card.
In the FC-140/S, we collapsed these 3 ASIC into a single one (S123) reducing the power usage significantly.
One last question.. Why does the value reported by the router are so diferent (lower) then the ones I got in the datasheets and in power calculator tool?
For example, from my calculations, for the configuration I have:
Nominal Power: 4636W
Max Power: 5260W
However when collecting the output from the router, i got:
RP/0/RP0/CPU0:CC-LAB01# admin show env power-supply
Wed Jun 5 18:58:04.483 WEST
Power Supply Voltage Current
DC-PEM DC-PEM (V) (A)
Zone 1: [A], [B] 52.712, 53.005 10.237, 10.655
Zone 2: [A], [B] 52.810, 52.614 7.939, 7.834
Zone 3: [A], [B] 52.516, 52.418 8.565, 7.312
Total Current: 52.542 A
Total Power : 2768.897 W
That is a huge diference...
all values produced by the power calculator are "absolute worst case" and that's for this particular worst case that the system should be dimensioned. (power consumtion varies a bit depending of the activity but most of the time, the peak consumption is at the boot up of the chassis).
I totally understand that, however the difference between the "real" power and the nominal/max power is huge! Even if we dimension the power system for the nominal power it is almost the double of “real” power. And this is really hard to explain to the costumer… Can you help me with that???
I'm afraid it's going to be difficult to "prove" this point.
As an example, I'll take the fan trays: at nominal speed (4000rpm), they use 151W each ---> 302W
When the system boots up the card are pushed to full speed (7500rpm) and use 860W each ---> 1720W.
Then the line cards PLIM+MSC140 are defined for 450W but typical load is 320W, that a 130W difference (x8 slots).
I strongly advise that your customer doesn't try to "push to the limit" here and trust the values provided.