A number of users have reported an issue in which Mac OS X 10.6.x (Snow Leopard) repeatedly drops WiFi (AirPort) connections when connected to a variety of wireless routers. Typical fixes for this issue (including switching to or from IPv6, resetting router settings, etc.) have proven largely ineffective.
We have, however, identified a few less-traditional fixes that have provided respite from the persistent drops for many users.
Fixes
Set up pings. This fix involves setting your Mac up to repeatedly ping your router, which may keep the connection active. Follow these steps
- Open System Preferences (available from the Apple icon in the upper-left corner of the screen), then navigate to Network > AirPort > Advanced… > TCP/IP and find your router’s address.
- Launch the Terminal application (click the Spotlight [magnifying glass] icon in the upper-right corner of the screen and type “Terminal”)
- Type the following at the Terminal prompt: ping 192.168.1.1 — replace 192.168.1.1 with your router’s IP address from step 1.
- Press return, and leave the Terminal open. This will produce a constant ping that may keep your connection active.
Apply latest firmware. Make sure that both your router and your Mac are using the latest available firmware. Check your router manufacturer’s web site for any updates.
In particular, several users have noted that the recently released MacBook Pro EFI Firmware Update 1.9 resolves this issue.
Change 802.11 spec on router. Try changing your router’s wireless spec mode from B, G and N to G only or vice versa. For AirPort routers, this can be accomplished with the AirPort Admin Utility. For other routers, this can usually be accomplished by accessing the router’s configuration page — open a browser and enter the address 192.168.1.1.
Change or turn off wireless security You may want to try toggling the settings on your wireless router, switching from WPA to WEP or vice versa, or, as a last resort, turning wireless security off altogether. For AirPort routers, this can be accomplished with the AirPort Admin Utility. For other routers, this can usually be accomplished by accessing the router’s configuration page — open a browser and enter the address 192.168.1.1.
Change to static IP assignment. Open a browser and enter the address 192.168.1.1 to open your router’s configuration page. Locate the IP assignment setting, and change it to static from dynamic.
January 18, 2011 at 5:04 PM
I had problems with 10.6.6 and after trying everything else finally reestablished normal life after I deleted all my keychain items except necessary certificates and keys and logged Into the airport afresh.
January 21, 2011 at 5:12 AM
Dit was voor mij de enige methode dat het gewenste effect gaf…GEEN DROPS MEER!
Here some brief instructions
you may have to add/edit your sysctl settings:
$ sudo touch /etc/sysctl.conf
$ nano /etc/sysctl.conf
Copy the settings into the file and save changes (just press CRTL+X and confirm with Y)
kern.ipc.somaxconn=512
net.inet.tcp.mssdflt=1460
net.inet.tcp.sendspace=98304
net.inet.tcp.recvspace=98304
kern.ipc.maxsockbuf=1048576
net.inet.udp.maxdgram=57344
net.inet.udp.recvspace=42080
net.local.stream.sendspace=98304
net.local.stream.recvspace=98304
net.inet.tcp.delayed_ack=0
net.inet.tcp.rfc1323=1
net.inet.tcp.rfc1644=1
net.inet.tcp.newreno=1
You have to reboot to make the changes affetive
bron:http://www.insanelymac.com/forum/lofiversion/index.php/t191076.html