Sites that monitor network problems?
I lost some links I once had. Can anyone remind me where there are sites where I can see network latency and spot problems with the major US backbones and datacenters?
For instance, I just had two clients tell me they can't see their sites, but I can, my monitoring service can, and my datacenter is experience no problems. So it's somewhere between them and the datacenter. It would be nice to be able to say "I see there is trouble in the XYZ network... there may be connectivity issues in the network between your ISP and the server."