I recently upgraded my plan to the gigabit plan. I have an SB8200 and though I have the gigabit plan, I am only getting on average between 180-200Mbps down. This test was done while my computer was directly connected to the modem.
The plot thickens: An agent just took me through their troubleshooting procedure. Here are the steps and statements that were made:
After rebooting the modem, the problem is back so CLEARLY there is a significant issue with Comcast's backend. Hopefully, someone here can help me get this straightened out because I can confirm, its not my side since the Agent was able to prove that. But apparently, their fixes can't tolerate a reboot, which is disconcerting.
What do the modem's signal stats look like ? Try getting them here http://192.168.100.1 or here http://10.0.0.1
Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.