[e2e] tcp in high rate network

[Steven Berson]

Note that this article was recently republished (with a current note from
the authors) in the 50th Anniversary Issue of IEEE Communications Magazine
(May 2002).

Regards,
Steve

On Mon, 17 Jun 2002, Jonathan M. Smith wrote:

> In the absence of errors and congestion TCP can run as fast as IP (minus
> some processing overhead) if properly tuned and presuming the end-point
> device has the horesepower to drive it. In practice, these latter two
> are coupled (e.g., choice of buffer size vs. host I/O capacity vs. DRAM
> speeds vs. slow-start vs. RTT ....). For an architectural prespective,
> see:
>
>
> %T An Analysis of TCP Processing Overhead
> %A David D. Clark
> %A Van Jacobson
> %A John Romkey
> %A Howard Salwen
> %J IEEE Communications Magazine
> %V 27
> %N 6
> %D June 1989
> %P 23-29
>
> For an experimental perspective, we filled most of an OC-3c between Philadelphia
> and Morristown NJ with TCP/IP/ATM/SONET in 1994 - the limitations were in the
> hosts, not the protocol. In later experiments in 1995, with different hosts,
> we were able to sustain 215+ Mbps, TCP/IP/ATM/SONET, albeit not over the WAN.
> The limit in this case was again the host, in particular a bus in the data
> transfer path.
>
> In summary, TCP seems to be able to run as fast as links as long as the factors
> pointed out above are addressed.
>
> 								-JMS
>
> > Does anyone know whether TCP can run efficiently on high rate links such as Tb ethernet.if the rate of access network is high too , what will happen,I am afraid that the efficiency will reduced due to the special congestion control of TCP.
> >
> >
> >
> > ______________________________________
> >
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>

-- 
Steve