poor throughput question

[Erik]

Craig,

Thanks for your info...I gather that you are talking about the lines between
the Colo Spgs telco and the POP for megapop in Denver when you refer to line
quality.  The reason I say this is that, when I dial another test account
from another ISP it connects fine, which would indicate the line from my
house to the CO is fine, is that correct??

At any rate, I think you re basically confirming my belief that there is a
latency problem with Megapop backhauling their lines from Colo Spgs to
Denver (foreign exchange), and that is why were are seeing the TCP problems.

Erik

"Craig Partridge" <craigp at world.std.com> wrote in message
news:Fo0soL.9M8 at world.std.com...
> It seems to me that you have two distinct concerns:
>
> * Your modem connect speed is not what you'd like.  That depends very
>   much on the particular conditions of the telephone lines between you
>   and Megapop (testing via another ISP does not demonstrate the state
>   of the lines, unless that ISP is colocates its equipment with Megapop).
>
>   The symptoms you describe are consistent with poor line quality
(possibly
>   due to backhauling of lines)
>
> * Your TCP transfer speeds from whatever site your are measuring from are
>   not what you'd like.
>
>   TCP transfer speeds depend on a variety of factors (distance to the
>   remote site, congestion, etc).  Traceroute is telling you how long
>   the paths are (are they similarly long via the other ISP)?  Tracking
>   loss is somewhat harder but you can look at your TCP retransmission and
>   duplicate ack transmission rates at your host to get a sense (these
numbers
>   should be very very low, except when loss occurs).
>
>   Others here may have better analysis tools.
>
> Good luck!
>
> Craig