Upgraded to Qwest/Century Link 40/20Mbps, would appreciate some tweaking advice :-)

Broadsword · Post by **Broadsword** » Wed Jun 22, 2011 7:44 pm

My service is Qwests/Century Link 40/20 VDSL2 service, pretty good so far besides the ping. I'm used to OOLs ping in NJ, I'd often get 10ms to anything in the tri-state, with this I'm lucky to get 45ms, kinda sucks for FPS gaming. Can anything be done about bandwith/ping? What about "Modify Network Adapters" in TCP Optimizer?

Client OS: Windows 7
Browser: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Please Read the Analyzer FAQ if the above is not your IP address.

TCP options string = 020405ac0103030201010402

MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.

MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.

Default TCP Receive Window (RWIN) = 66792
RWIN Scaling (RFC1323) = 2 bits (scale factor: 2^2=4)
Unscaled TCP Receive Window = 16698

In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the SG Vista TCP/IP patch instead of the TCP Optimizer for automatic tweaking.
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be. 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.

RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2672 kbps (334 KBytes/s) @ 200ms
Your TCP Window limits you to: 1069 kbps (134 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 57 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 00000000 (0)

:::.. Combined Test Results ..:::
Download Connection is:: 35785 Kbps about 35.8 Mbps (tested with 50 MB)
Download Speed is:: 4473 kB/s or 4.5 MB/s
Upload Connection is:: 13871 Kbps about 13.9 Mbps (tested with 17.5 MB)
Upload Speed is:: 1734 kB/s or 1.7 MB/s
Tested From:: http://testmy.net (Dallas, TX USA)
Test Time:: 2011-06-22 18:16:57
Validation:: http://testmy.net/db/i1oFbdl.K9PlH2Q
User Agent:: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) [!]

Any advice would be greatly appreciated, thanks!

akbarri · Post by **akbarri** » Thu Jun 23, 2011 10:32 am

Download SG Vista TCP/IP Patch : http://www.speedguide.net/files/vista/S ... _patch.cmd
Run & Choose "Y" from the Menu to Optimize ( or "D" to rever to Defaults )

Broadsword · Post by **Broadsword** » Fri Jun 24, 2011 9:22 pm

« SpeedGuide.net TCP Analyzer Results »
Tested on: 06.24.2011 21:19
IP address: 97.xxx.xxx.xxx
Client OS: Windows 7

TCP options string: 020405ac0103030801010402
MSS: 1452
MTU: 1492
TCP Window: 66560 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 260
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2662kbps (333KBytes/s)
BDP limit (500ms): 1065kbps (133KBytes/s)
MTU Discovery: ON
TTL: 57
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the SG Vista TCP/IP patch instead of the TCP Optimizer for automatic tweaking.
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be. 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.

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)

Ok, I used the SG Vista Patch. Are the results any better? How do I change my RWIN to the 1022208? Cablenut? When I retrieve my current settings through Cablenut I've got like 3 boxes with numbers, lol

Any idea why when I run speed tests from testmy.net with Chrome my download will hit 37Mbps but my upload will only hit 7Mbps? Seconds later if I run the same test with IE9 I'll get 36/15Mbps, I can go back and forth with the same results every time.

Thanks for the help akbarri!

Rollingstone · Post by **Rollingstone** » Sat Jun 25, 2011 8:03 pm

Client OS: Windows 7

In WIn 7 , you cant change RWIN yourself, it's auto-tuning (tune automatically itself) !

Broadsword · Post by **Broadsword** » Sat Jun 25, 2011 10:31 pm

So there's nothing else I can do? I'm tapped out? Just making sure, thanks!