In my case the local network is still up and responding normal, it is the actual Internet that is being blocked, or consumed. (There is no delay in talking to local resources on my network.) That really is different than how a flood of DHCP request from the Directv Recievers would act, as they are on a subnet of the Wi-Fi router, and in theory should be isolated there. The broadband Cinema Server should isolate those request. What I'm seeing is something eating up my 19+ Mb/s of Internet speed, leaving me with just 0.63 Mb/s of Internet bandwidth.
I finally stumbled across this thread, and have been struggling with this exact same issue for months. Please bear with me as I fill you in on the history of what's been done..
Symptom: Our 15Mbps CenturyLink DSL will suddenly slow to about .50 Mbps and that will last for anywhere from 2 to 8 hours, until it suddenly resumes full speed on it's own without restarting the modem or any other intervention on our part. First it was rather sporadic, maybe only happening every couple of weeks. No real set time for it to start, usually in the evening but could really be any time. We had a DirecTV HR24 DVR with a CCK attached.
We initially thought it was DSL related, had the modem swapped out but the problem persisted. Long story short, I narrowed down the problem to the DVR - once I unplugged it from power, the problem went away and as soon as I plugged it back in, the slowdown began again (it must be a hardware problem with either the DVR or the CCK, right?). Fast forward to contacting DTV and upgrading to a new Genie - and I thought I had the problem licked, but after a few days the problem has resurfaced. When the network 'flood' begins, you can watch the router lights flashing like crazy that it's getting hammered with packets, and as soon as we unplug the Genie from power, the problem goes away.
I've reset the box and taken it off of our wireless network, to no avail. I've tried blocking the DTV box MAC addresses in the router, and that works for a few days until the router gets hammered again. I can then put the MAC addresses off and back on the 'Deny' list and it will work for another few days until it doesn't work any longer. I've played with almost every setting on the router (including disabling uPnP) and nothing seems to work long term. The last try was to reset the DVR back to original settings, take a really long ethernet cable to temporarily hook it to the router so that it uses the 'wired' settings and then disconnect it. That worked for a couple of days until the wireless started bombing again (connecting permanently to ethernet really isn't an option for my layout). I'm willing to live without onDemand and have no internet connection to the DVR, I just want it to leave my wireless network alone. It really has come down to either having internet or TV, but not at the same time.
I'm at wit's end - and noticed that the previously post never really was resolved, and DTV has been no help. Has anyone else here ever seen anything like this?
Thanks in advance for any light you can shed on this issue.