Why is Energy Detect disabled by default?

[00u1co5uk8fvAlsO75d7]

My switch supports "Energy Detect" in Green Ethernet settings. I don't want to waste power, and the documentation doesn't mention any drawbacks, so I have enabled it and everything works fine (except that the router sometimes resets Energy Detect at firmware updates/reboots). So:

• Does Energy detect really save energy?
• Is there any disavantage of using Energy Detect?
• If no, why is it disabled by default?

[Georg Pauwen]

Hello,

the idea of Green Ethernet/Energy Detect is to conserve power. Check the difference in the 'Power Savings' and 'Cumulative Energy Saved' with 'Energy Detect mode' enabled and disabled:

show green-ethernet GE1/0/4

[00u1co5uk8fvAlsO75d7]

Thanks, I have already done that. The power savings seem to increase when Energy Detect is one. But:

Is there any disavantage of using Energy Detect? If no, why is it disabled by default?

[pman]

Hi,

when you turned on the green-ethernet the "disable port LEDs mode:" is Enabled/disable?

switch#show green-ethernet
Energy-Detect mode: Enabled
Short-Reach mode: Disabled
Disable Port LEDs mode: Enabled

[00u1co5uk8fvAlsO75d7]

If I remember correctly, I had disabled the LEDs manually (because I don't need them 99.99% of the time). Is this somehow related to Energy Detect?