I have a 2009 Macbook Pro, and over the last couple of days my network is getting really flakey. I am now running the NetworkDiagnostics program constantly so that the lights show. I will see that I lose network connectivity -- web pages won't (re)load, Facebook stops updating or shows pictures as broken links, sometimes my Skype, Adium and/or iChat goes offline. When I look over at the lights, they are green all down through ISP, and then Internet and Server are red. A couple of times I have caught it with Server green and Internet red. If I go through the reconnect sequence in the NetworkDiagnostics, it will come right back. Or maybe I'm fooling myself that anything I am doing matters, and it just comes back on by itself...
Wednesday night both my daughter (she on her iPad) and I were having problems getting and staying connected so we didn't try to use netflix. But last night we watched netflix and it stayed up like a champ all evening, while my Internet/Server lights kept going red.
At work, ISP is LISCO, I connect via an ethernet cable. No one else at work seems to be having any network problems.
At home (30 miles away in a different state topologically far from work), ISP is Frontier, and I connect via AirPort card to either my wireless router or another wireless router that is configured as an access point.
Last night at home I also tried tethering to my iPhone -- carrier is Verizon. It was doing the same thing.
On a lark, I removed 188.8.131.52 as the top entry in my DNS lookup and rebooted -- didn't seem to make any difference.
I don't really understand in any detail what the NetworkDiagnostics program means by having these lights for "Network Settings", "ISP", "Internet" and "Server" -- does anyone understand better what this is telling me about what is worng?