Ethernet, FastEthernet saturation

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Hi folks,


could somebody give me some link about saturation (why, how,...) in
ethernet & fastethernet networks...

I would like to know why it's possible to transmit over ethernet
networks just cca 7Mb/s and over fastethernet cca 70 Mb/s...

What is the explanation of the phisics behind it?

thanks
dan

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

nooo <noo.nospam@nosmapnospam.net> writes:

>I would like to know why it's possible to transmit over ethernet
>networks just cca 7Mb/s and over fastethernet cca 70 Mb/s...

It is possible, and common, to send much more than that.
With current (last few years) common server hardware, it
is no problem at all to push ca. 11 Megabyte per second
down a fast ethernet link, under normal server operation
of e.g. an ftp server.

Anything slower is either the result of an unfortunate window size,
or a sign of how contemporary software can slow things down by
animating window borders, or something.

best regards
Patrick

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Patrick Schaaf wrote:

> Anything slower is either the result of an unfortunate window size,
> or a sign of how contemporary software can slow things down by
> animating window borders, or something.

Window size refers to TCP, not ethernet, or even IP. With ethernet, the
frame is placed on the wire, with no flow control.

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Patrick, thanks for info...

looks like that i have old switches and old software...

Patrick Schaaf wrote:
> nooo <noo.nospam@nosmapnospam.net> writes:
>
>
>>I would like to know why it's possible to transmit over ethernet
>>networks just cca 7Mb/s and over fastethernet cca 70 Mb/s...
>
>
> It is possible, and common, to send much more than that.
> With current (last few years) common server hardware, it
> is no problem at all to push ca. 11 Megabyte per second
> down a fast ethernet link, under normal server operation
> of e.g. an ftp server.
>
> Anything slower is either the result of an unfortunate window size,
> or a sign of how contemporary software can slow things down by
> animating window borders, or something.
>
> best regards
> Patrick