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10.4: Disable IPv6 networking for possible speed gain
Authored by: JasonInOregon on Aug 21, '06 08:01:43AM
Well, I got it figured out - at least for my particular situation.

Turning IPv6 off gave me a tiny but noticeable performance increase. That's nice, but nowhere near enough. I'm paying for 8mbps service, and I'm not even getting 1/4 of its potential.

After talking to someone very smart at Apple and someone (average) at Motorola, I found out that the Motorola SB5101 cable modem is not fully compatible with "certain" Mac systems. See my voicemail link below.

I tried a new Linksys cable modem, but it had the same problems - crappy download speeds, but decent upload speeds. I finally switched to the SB5120 and now I'm getting 10mbps speeds!!

I made my own post about it here:
http://www.jasonandcodi.com/2006/08/comcast-sb5101-mac-poo.html

See if this voicemail from Motorola sheds a little light on the situation:
http://www.jasonandcodi.com/mp3/20060819/Motorola%20SB5101.mp3

The upgrade to the SB5120 really worked for me. Hopefully it'll work for you.

Good luck!

Jason

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