[c-nsp] 6509 DC power question-

[Jon Lewis]

On Wed, 16 Feb 2011, Luke Pack wrote:

> Greetings everyone,
>
> We have a 6509 switch with sup2 engines.  For upgrade capability, we
> have the 2500W DC power supplies in this.  I have an A/C unit with the
> same engines/cards at a separate location, therefore I expect this
> unit to require the same amount of power.  Here is the "show power"
> from the A/C unit in production:
>
> #########show power
> system power redundancy mode = redundant
> system power total =     1153.32 Watts (27.46 Amps @ 42V)
> system power used =      1011.78 Watts (24.09 Amps @ 42V)
> system power available =  141.54 Watts ( 3.37 Amps @ 42V)
>
> At the location, it looks like we are only going to get 50A dropped to
> our rack.  This drop will be ONLY for the 6509.  In the documentation,
> they say 70A input is needed for these 2500W PSUs

If you're nowhere near 70A of actual power usage, you don't need the 70A 
fuses.  Just keep in mind when installing cards later that you don't 
really have all the power capacity the chassis thinks you have.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________