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I have Gigablast service that is now suddenly topping out at 300mbps DL and 5mbps UL. Up until last week I had full 1000mbps speed DL and 40mbps UL. My modem is a Motorola MB8600. Its obvious that COX has changed their system in some way within the last week or so and caused this issue.
I had a COX tech come out who determined that my modem is the issue and most likely needs a firmware update but that they wont update it since its customer provided!
I contacted Motorola who told me that they do have a firmware update to my MB8600 which they have forwarded to COX to provide to their customers. They said that ALL updates should be provided by COX. They said they specifically created this firmware after COX system updates have created intermittent connectivity issues and degraded speeds to many Motorola users modems.
Motorola said they will contact COX to tell them they should be pushing this update to me. We will see what happens....
Oh, and as a cherry on top, it looks like COX will be charging me $75 for the service visit since the problem was a "customer equipment issue".
I WISH COX SUPPORT WOULD GIVE ME AN UPDATE ON THE MB8600 MODEM ISSUES!
I've been intermittently taking speed tests and seeing if things have changed, as I'm sure you have as well. I also checked my router settings, and for some reason I had dynamic QoS on which may have been affecting my speed tests, because when I turned it off and then tested again this morning (unfortunately, before I had tested today, so I am unsure if it actually had an effect), I was up to between 400-500Mbps, and when I just tested now I got up to 535Mbps. So, either it's a gradual improvement, or perhaps some other fluctuation.
seper8tor for testing purposes do you think you can try bypassing your router and connect directly to your modem with a cat cable to a computer. It solved Steelbender's speed issue and he was able to determine it was actually his router that was the bottleneck. I'm wondering if your router might also be the culprit. Not to say you don't actually have a Cox issue.