I have had a persistent problem for the past 3+ months. Comcast has been unable to help me. They either blame my wifi (which it is not) or my router (which has been replaced 3 times). Or, they stop responding completely.
Every night starting around 11pm and ending around 2am (times vary) my upstream connection begins failing when I generate any reasonable amount of upstream traffic. During the day I can easily get ~5Mbps upstream with 0 packet loss. At night, I'm lucky to get 100kbps with 10% packet loss.
Then, as suddenly as the problem came on, usually around 2am, the problem goes away and I am able to push good speeds again.
I can sometimes reproduce the problem during the day by generating upstream traffic and monitoring my internet connection from outside my home, pinging my router. My upstream traffic will fail/stall, the pings will drop, then 2 seconds later everything recovers and starts working again, albeit slowly.
The problem is reproducible almost every night. When I am on the road trying to use my slingbox in my home this gets extremely frustrating.
As I said, Comcast has been less than helpful. They blame my wifi, even though my wifi isn't involved. My cable modem is hard wired to my router which is hard wired to my internet appliances (sling). They blame my router, which I have replaced twice, and now use a higher grade small business router. They blame my cable modem, which I rent from them, and have replaced 3 times.
What can I do at night when I have these problems to help troubleshoot this further? When the connection comes back up I can VPN into my home and get whatever data is needed from the cable modem, but, I don't know if it is too late at that point.
Suggestions?
I thank you very much for your help. As you can imagine I am very frustrated.
Thanks,
J
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