[c-nsp] power down of standby sup is not possible

[Seth Mattinen]

Tassos Chatzithomaoglou wrote:
> Anyone care to explain why such a limitation?
> 
> 7609(config)#no power enable module 5
> %Error: no power control on supervisor cards
> 
> 7609#sh mod
> Mod Ports Card Type                              Model             
> Serial No.
> --- ----- -------------------------------------- ------------------
> -----------
>   5    2  Supervisor Engine 720 (Hot)            WS-SUP720-3BXL
>   6    2  Supervisor Engine 720 (Active)         WS-SUP720-3BXL
> 
> 
> I'm trying to power down the standby sup and i though cisco's green
> agenda would have though of that.
> 
> 

It's not a "green" thing, but a "redundant" thing. A second supervisor
is for redundancy, and if it's off and unconfigured, you might as well
just store it on a shelf and swap it in when needed because you won't be
able to power it up anyway if the active sup fails. They're doing more
than just synchronizing config changes when in standby mode.

~Seth