Originally Posted by qasdfdsaq
Too much downstream capacity if you ask me.
8 channels times 55 megabits = over 400mbps of download capacity. Since TCP uses about 2% of that for ACKs, that's nearly half an upstream channel's completely gone even without anybody uploading a single thing.
(Course they do use ACK suppression so the actual effect may be lower)
I havent seen anything to indicate they do actually use ack surpression. All I have seen is a link that explains docsis supports it.
Also not everyone will have delayed acks enabled granted the majority of people will but some I expect for their own reasons may have it turned off, and some software selectively disables delayed acks as well.
I agree with craig anyway and you have it the wrong way round, the downstream isnt too high at 400mbit but rather the upstream is way too low.