RE: Cox clamping VPN traffic?

["Justin M. Streiner" <streiner () cluebyfour org>]

On Fri, 25 Jan 2008, Tomas L. Byrnes wrote:

> The throttling I am talking about occurred on business class service
> which is rated at 16Mbps/2Mbps and is NOT cheap. I'd love to know what
> the throttling mechanism Comcast uses is, as Cox swears up and down that
> they have no such thing in place. That both got throttled to the EXACT
> SAME, non multiple of a DS0, is just a bit too coincidental for me.
>
> If it was some sort of trunk capacity or mux issue, I would expect the
> BW I was left with to be a multiple of 64Kbps or 1.544 Mbps, not some
> odd-ball number like 43Kbps.

Could it be that the provider is silently inserting RSTs into live flows?
This is not unheard of and would have the capability to send throughput 
into the toilet.

Before walking down that road, however, are you sure you're not dealing 
with an MTU/TCP-MSS/DF bit issue?

jms