I have seen a lot of people complain online about their modems/internet speeds. I too have consistent problems with Comcast internet. However recently being involved with setting up new office internet rated at 100/100mbps from a different provider, I found out something which I hope people can shed more light on here.
With this other provider we experienced bad speeds as well. 10/50mbp vs the marketed 100/100mbp. However when we disconnected the Cisco/LinkSys router and connected directly to the modem we got the 100/100 speeds. We found that "duplex" speeds was the variable here. Using ethernet cable directly to the modem our networking settings showed full duplex. When we introduced the router back in it jumped back to auto negotiate for duplex. Even the other provider confirmed they hard set their lines for full duplex to provide consistent high speeds.
Last night I had what appeared to be a 2 hour outage. Restarting my modem (Ambit Microsystems Corp. u10c035) and router (D-Link DIR-615) over and over... in the end I was back up. At 10/10mbps. Louzy for Comcast Blast internet speeds right. So I connected directly to the modem and nearly fell off my seat. 110/10mbps. Wow! My router is auto negotiating duplex speeds as well. I assume this may also be related why I need to restart both devices at the same time and hope they "sync up" so I can have internet again. There has to be a better way?
So the questions are???
What is a better way? Get a router which I can set duplex mode to full vs auto negotiate?
What would that router be when most consumer routers are hard set to auto negotiate duplex?
Is this a common problem that no one has tackled on the consumer side with fast internet speeds requiring full duplex and most routers on the consumer market not providing for it? Even though their advertised speeds state 300mbps+?