Also can't ping your site so... L3 has shut down ICMP packet responses. Either in LA at a switch or at your ISP... If that some terror avoidance thing to a DDOS attack it's foolish. Can't ping your own site to see if it's still up? 'Brilliant'. Can't traceroute past this bridge/switch.... INTERNET-BR.car1.LosAngeles1.Level3.net
Make a call get the network guys on a bridge line and get them to fix it. You have enough traffic hitting your site to have them diagnose either a bad board, port or otherwise, maybe even mis-matched half/full/speed issue in the switch. It only takes 1 small error that's not looked at to get problems to crop up. And if you don't ask all the questions you get the same response.... silence.

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