How to disable IPv6 on MAC OS X Lion?

Hi everyone,

I am using Macbook Air OS X Lion. I have been facing slow internet browsing problem from quite a while now. I checked the forums and found that lot of people are facing the same problem. Also found that disabling IPv6 or setting it to manual mode will help fixing the issue. But another big challenge is how to do it. I tried setting it to manual which would need router address, IPv6 address and prefix length which is supposed to be collected from your ISP. Unfortunately Comcast hasnt implemented IPv6 yet so couldnt find that information. Also couldnt find the disable option as mentioned in one of the Apple article.

So I am stuck with Macbook air with slow internet speed. If anybody could help, it would be much apprecaited.

Thanks,

SJ