Disabling power management on wireless nic

I'm actually having the same issue and have been looking for a how to on how to do this?

Yes, I would like to know how to do this also. We have been asked by Cisco to disable this setting to try to stabilise Lion Clients on wireless

I don't believe there is such a setting; however, there is a workaround you can implement that should help keep the system connected by having it automatically turn Wi-Fi off and back on to re-establish any lost connections whenever it does not have a proper IP configuration:

http://reviews.cnet.com/8301-13727_7-57347274-263/wi-fi-network-not-connecting-a fter-sleep/

No, that's not what I've been looking for.

Just like what Kinga1234 said, this is a setting that can cause conflict with some wireless access points that don't support this feature. And if the laptop is sitting idle for a few minutes, it goes into a low wifi powered state that becomes noticeable with some programs and causes lag. So I've been trying to find a way to disable it in Mac OS X. I've gotten it for Windows and Linux / Ubuntu.

EDIT: The connection doesn't get lost, so turning it off/back on won't fix it, it just becomes low powered like I stated above.

True, the connection doesnt get lost, but the Cisco Lightweight Access Points recognise the Macbook has dropped into a Low power/Power management state after a few minutes of no network activity. A show client on the console of the WLAN controller shows the client has dropped into a power management state after a few minutes of inactivity, not inactivity on the machine, but network inactivity.

WLANCONTROLLER#>show client detailX.X.X

Client MAC Address............................... X.X.X.X

Client Username ................................. XXXXX

AP MAC Address................................... X:X:X:X:X

AP Name.......................................... AP_XX

Client State..................................... Associated

Client NAC OOB State............................. Access

Wireless LAN Id.................................. 2

BSSID............................................ X:X:X:X

Connected For ................................... 350 secs

Channel.......................................... 161

IP Address....................................... X.X.X.X

Association Id................................... 6

Authentication Algorithm......................... Open System

Reason Code...................................... 1

Status Code...................................... 0

Client CCX version............................... No CCX support

Re-Authentication Timeout........................ 82958

Mirroring........................................ Disabled

QoS Level........................................ Silver

802.1P Priority Tag.............................. disabled

WMM Support...................................... Enabled

Power Save....................................... ON

Current Rate..................................... m15

This is enough to force a full re-auth of the client

Apple clients dont support Cisco CCX extensions so Key Caching cant occur, and full re-auth is required, which can cause client to lose connection.

If the client could be forced to keep the WLAN card active when the macbook is on there would be no issue. Seeing as OSX is based on linux, one would assume this would be a possibility to have this available as an option, even if it doesnt exist currently surely it isnt a limitation of the hardware, merely the OS.

I wonder if setting up an infrequent ping would keep the adaptor from going into a low power mode?

ping -i 10 -q IP_ADDRESS

The infrequent ping sounds like a great temporary fix, was hoping for a sotware one so it'd be permanent. Didn't want them having a window open up in the bottom for them to keep that ping going, but that may be the only fix.