Cable Forum - View Single Post - 50MB

Ignitionnet · 06-08-2010, 10:20

The standard upgrade for 100Mbit and 10:1 ratio is 2 resegmentations and a doubling of channel width on overlay network, increasing upstream bandwidth by a factor of 8 and quadrupling downstream.

There is no requirement to ack every single packet, I'm not sure where this comes from. TCP does, by default, do cumulative acknowledgement - an ack implicitly acknowledges every transmitted packet up until the sequence number the acknowledgement is supplied for.

The exception to this is misconfigured TCP stacks.

If one is acknowledging every single packet 100Mbit requires 3.6Mbit of upstream as a bare minimum, which would, yes, mean that 1.75Mbit is not enough for the 53Mbit downstream on the 50M.

HTH.

06-08-2010, 10:20	#29
Ignitionnet Inactive Join Date: Jun 2008 Location: Leeds, West Yorkshire Age: 47 Posts: 13,995	Re: 50MB - 10MB Upload ? The standard upgrade for 100Mbit and 10:1 ratio is 2 resegmentations and a doubling of channel width on overlay network, increasing upstream bandwidth by a factor of 8 and quadrupling downstream. There is no requirement to ack every single packet, I'm not sure where this comes from. TCP does, by default, do cumulative acknowledgement - an ack implicitly acknowledges every transmitted packet up until the sequence number the acknowledgement is supplied for. The exception to this is misconfigured TCP stacks. If one is acknowledging every single packet 100Mbit requires 3.6Mbit of upstream as a bare minimum, which would, yes, mean that 1.75Mbit is not enough for the 53Mbit downstream on the 50M. HTH.