Tcp optimizer settings

Ramazan · Post by **Ramazan** » Thu May 23, 2013 9:00 am

Hello everyone, this is my firt post i hope its in the right place. Got a problem with tcp optimizer. I run the program as administrator, have disabled autotuning and heuristics. When i click optimal settings, and reboot it doesn't change. It goes back to normal. Any ideas?

Thx in advance

Ramazan · Post by **Ramazan** » Sun May 26, 2013 10:34 am

Nobody?

Ramazan · Post by **Ramazan** » Sun May 26, 2013 10:39 am

Btw i'm using windows 7, 32 bit.

Ramazan · Post by **Ramazan** » Wed May 29, 2013 11:40 am

Isn't this the TCPoptimizer forum??

Ramazan · Post by **Ramazan** » Tue Jun 04, 2013 3:39 am

Thread can be closed..

zmfhkl · Post by **zmfhkl** » Thu Jun 06, 2013 6:14 am

Hi,nice to meet you.

zmfhkl · Post by **zmfhkl** » Thu Jun 06, 2013 6:15 am

I'm come from china.

misdirection · Post by **misdirection** » Tue Aug 18, 2015 3:47 pm

so theres no help for this cause im having same prob?
win7 ent edition 64bit
i have admin rights

Post by **Philip** » Wed Aug 19, 2015 10:03 am

What happens if you drop to elevated command prompt and type:

netsh int tcp set global autotuninglevel=disabled

netsh int tcp show global

What about the second command only after reboot ?

elmoteroloco · Post by **elmoteroloco** » Tue Sep 01, 2015 8:18 pm

Hi Philip!
Im new at the forum and run TCP Optimizer (3.08 ver) on windows seven 64bits ultimate.
Im not english speaker and mabe have some comprehension trouble at the tech speaks, so, here am I.

my question is about how to set the RWIN scaling, cause, even if the Tcp optimizer show the choice marked, the online Analyzer give me this results:

without scaling

(IP matches)

anyway, let you too the images of the Tcp optimiser -current- and the command prompt answer to "netsh int tcp show global" (and a probably unnecesary translation on the last one)

answer to "netsh int tcp show global" translate:

Receive-side scaling state: enable
TCP Chinney offload: enabled
Net DMA: enabled
Direct cach access (DCA): enabled
Congestion Control Provider: ctcp
ECN capability: disabled
Timestamps 1323: disabled

the advanced settings -current- (they loock well to me):

Im on a 6 Mb DSL and have a good response, download speed checks give betwen 6.40Mbs (rush hour, loaded browser) and 8.7Mbs (low traffic hour, clean browser) with 13/12ms ping, so no complains, but, well, just want to know what Im doing wrong (or don't doing) to scaling the TCP receive window

Thank you for all (and sorry if its an inadecuated place for the answer :facepalm

Post by **Philip** » Tue Sep 01, 2015 11:23 pm

Well, if you disable "TCP Window auto-tuning" (Nivel de ajuste automatic de ventana de recepcion), your TCP Receive Window will be limited and scaling will be turned off. Have you tried changing it to "normal" ?

elmoteroloco · Post by **elmoteroloco** » Wed Sep 02, 2015 1:49 am

Ok, I set "TCP Window auto-tuning" to normal, reboot and run "show global" cmd:

then I go for the SG TCP Analyzer and see this...

now its working

"Also, RWIN being close to and above 65535 does not justify the header overhead of enabling TCP 1323 Options. You might want to use one of the recommended RWIN values below."

well, I don't know what to think about that... previous config mabe go better?

anyway, thx for the magic, Philip!!

Post by **Philip** » Wed Sep 02, 2015 7:31 am

The problem with Windows 7 is that it "auto-tunes" the TCP Window, depending on network conditions. It changes over time, the Analyzer only reads the current value.

We can change the way the auto-tuning works (normal, aggressive, restricted, disabled), but that's about it, we have no direct control of the scaling anymore (other than turning it on and off).

With speeds lower than ~3 Mbps, you can safely turn off the scaling without much negative impact on throughput, but with broadband connections it should be on.

audiomap · Post by **audiomap** » Sun Apr 24, 2016 1:50 pm

Same Problem of 'auto reset' in windows 8