Point to Point testing

you can try wireshark what is in fact network protocol analyzer you can use (actually not for speed testing, but for network testing).

Create a test file that's several gigs ( let's say 30 or 40 GB) and see the transfer speed and time. There are many small utilities that will generate files with the desired sized filled with either ones or zeros or random characters.

We use NetGong (formerly IPmonitor) to monitor network stability.  It will provide a nice html format report of any disconnects.
http://netgong.tsarfin.com/download.html

I downloaded the netgong which looks pretty cool but it looks like the lowest setting is 1 minute where the disconnect could only be out for 1 second.

Yes 1 minute is a limitation.  If you feel you need to check every 1ms I posted the following a while back:

I put the following together. It should test your connection for you (>1/sec), however careful, it is pretty crude. It runs forever until you press Ctrl+C, but it makes no log entries until there is a disconnect. However, if the cable is disconnected for long it will fill the log very quickly. You might want to put some limits on it but I didn't have time right now. To run you need a tiny utility called Alive, as explained in the batch file. Just save with a name like Connect.bat and run by entering Connect <IP address>  e.g.  Connect 123.123.123.123  It will create a log file in the same folder named IPlog.txt with basic diagnostics as to why the disconnect.
Hope it is of some help.


Echo Off
Cls
Set TestIP=%1%
:: Download a little app called Alive from  http://www.free-downloads-center.com/download/alive-20646.html
:: Extract the files to a directory with this batch file and run using 'FileName <IP address>'
::  (see the Alive.txt file for an explanation of the app)
Echo.
Echo Note: This batch file will run FOREVER and if the cable is disconected for any
Echo  length of time, it will great a very large log very quickly.
Echo.
Echo  Press Ctrl+C  to exit
Pause

If Exist IPLog.txt Del IPLog.txt
Echo IP monitoring started %Date:~0,12% %Time:~0,5% >>IPLog.txt

:NEXT
ALIVE /Timeout=3 %TestIP%
If ErrorLevel 255 GoTo E255
If ErrorLevel 8 GoTo E8
If ErrorLevel 7 GoTo E7
If ErrorLevel 6 GoTo E6
If ErrorLevel 5 GoTo E5
If ErrorLevel 4 GoTo E4
If ErrorLevel 3 GoTo E3
If ErrorLevel 2 GoTo E2
If ErrorLevel 1 GoTo E1
GoTo NEXT
:E1
Echo %Date:~0,12%  %Time:~0,5% Request timed out >>IPLog.txt
GoTo NEXT
:E2
Echo %Date:~0,12%  %Time:~0,5% Destination host unreachable >>IPLog.txt
GoTo NEXT
:E3
Echo %Date:~0,12%  %Time:~0,5% Destination network unreachable >>IPLog.txt
GoTo NEXT
:E4
Echo %Date:~0,12%  %Time:~0,5% Destination protocol unreachable >>IPLog.txt
GoTo NEXT
:E5
Echo %Date:~0,12%  %Time:~0,5% Destination port unreachable >>IPLog.txt
GoTo NEXT
:E6
Echo %Date:~0,12%  %Time:~0,5% Hardware error >>IPLog.txt
GoTo NEXT
:E7
Echo %Date:~0,12%  %Time:~0,5% TTL expired in transit >>IPLog.txt
GoTo NEXT
:E8
Echo %Date:~0,12%  %Time:~0,5% Bad Destination  >>IPLog.txt
GoTo NEXT
:E255
Echo %Date:~0,12%  %Time:~0,5%  Unknown errors  >>IPLog.txt
GoTo NEXT