Tweaking a 50/50 Symmetrical Fiber Connection

[baalpeteor]

What programs are good enough to tweak a 50/50 fiber connection? I saw that sg optimizer only goes to 20 mb and that's prob for dsl or something.

[Rollingstone]

Post your TCP Analyzer report.

[baalpeteor]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 05.11.2009 09:58
IP address: 74.80.xx.xxx
Client OS: Windows XP

TCP options string: 020405b40103030401010402
MSS: 1460
MTU: 1500
TCP Window: 921600 (NOT multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 57600
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 36864kbps (4608KBytes/s)
BDP limit (500ms): 14746kbps (1843KBytes/s)
MTU Discovery: ON
TTL: 50
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)






in case the rest is useful...
TCP options string = 020405b40103030401010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
Default TCP Receive Window (RWIN) = 921600
RWIN Scaling (RFC1323) = 4 bits (scale factor: 2^4=16)
Unscaled TCP Receive Window = 57600

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
64240 (up to 2 Mbit lines, depending on latency. MSS * 44)
128480 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
256960 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
513920 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1027840 (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: 36864 kbps (4608 KBytes/s) @ 200ms
Your TCP Window limits you to: 14746 kbps (1843 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 50 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)

[baalpeteor]

and thats through a router running tomato. It had dd-wrt but I found out dd-wrt is alot slower. May go back to stock linksys firmware (mine had speedboost) as it will probably be even faster being it doesn't have all the goodies tomato does. The rj45 comes right from the fiber box to the wall socket. After connecting it straight the only difference was a 1 second TTL lower than through router. Highest speeds i've seen is day 1 which was 32 or 34 mb down and like 20 something up. Right now testing it at speakeasy at the Dallas, TX server ( im in LA) i get

Last Result:
Download Speed: 18008 kbps (2251 KB/sec transfer rate)
Upload Speed: 12939 kbps (1617.4 KB/sec transfer rate)

but before that strangely i got a 48/15 mb connection. but i've never downloaded over 1.3 megabytes a sec at a time on any file. and usually the speeed tests ( i run like 7 back to back to make sure) come to 14-23 mb.


also the pc in question is xp pro sp3. if I still had my gaming toshiba w/ vista ultimate on it still up it would prob get better readings.

[Rollingstone]

Try the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
Windows Scaling - check
TCP Receive Window - 1027840
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 10
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

[baalpeteor]

Try the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
Windows Scaling - check
TCP Receive Window - 1027840
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 10
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

seems to be giving me more stable results. i also ran that speedupmypc 2009. That got rid of some stuff. When I say more stable im getting 30mb+ but the upload is just getting around 14 mb each time. Could be the time of day and people uploading alot of stuff, although I doubt anyone else on my street is paying for 50/50 mb but who knows. it IS only 58 bucks.

thanks. I will try tonight when everyone should be sleeping. this pc is slow also running a 3.06 ghz p4. laggy. so i will also try on my desktop once i install windows back on it

[baalpeteor]

on my amd desktop (brand new xp pro with sp3 and all software that SHOULD come with windows integrated) with my crappy wifi card (linksys router with tomato in next room) I got 12 mb down and a lil less up at the best. Taking a super long cat5 cable the fiber company made for me (to put in the attic if I wanted) straight to my pc i got around 47-48ish down .... but only 10-12 mb up! I dunno why.

Now after running the same settings you posted above on my new pc with a direct line I get (from dslreports)....
Last Result:
Download Speed: 56470 kbps (7058.8 KB/sec transfer rate)
Upload Speed: 33164 kbps (4145.5 KB/sec transfer rate)
Latency: 15 ms
Tue May 12 2009 07:05:49 GMT-0600 (Central America Standard Time)

from a server in the same state (more than what i pay for on download). each test is over 50 mb although it lags and drops (sorta stalls) then goes and catches up so it may be more like 60+ in reality.

from speakeasy a server next door (TX) i get:
Last Result:
Download Speed: 51865 kbps (6483.1 KB/sec transfer rate)
Upload Speed: 12971 kbps (1621.4 KB/sec transfer rate)

so the problem is upload now. Could it be a setting that can be tweaked to allow the upload to be as high? Or maybe its just the speed test doesn't expect a symmetrical 50 mb upload speed and it can't really test it (because the upload test is blazing fast like maybe 1 second if even at times).

[Rollingstone]

Upload cannot be tweaked !

Nothing wrong with the speed from your ISP. How fast you can upload will depend on how fast the other end can download. I doubt there are many websites that can handle upload at 50 mbps just to one connection. It's the same for you.

[baalpeteor]

Upload cannot be tweaked !

Nothing wrong with the speed from your ISP. How fast you can upload will depend on how fast the other end can download. I doubt there are many websites that can handle upload at 50 mbps just to one connection. It's the same for you.

that sux for now. cuz as broadband gets more avaialble and cheaper, more people will have symmetrical connections of 20mb+ . This area will have 150/150 soon for businesses. i'd love to do a speed test of that. probably will cap the download and upload of the test server.

i just did a test and :

Last Result:
Download Speed: 61253 kbps (7656.6 KB/sec transfer rate)
Upload Speed: 12415 kbps (1551.9 KB/sec transfer rate)

so im guessing the max upload that server (speakeasy TX) has is around 15-30 mb or something. And that was the speed while downloading like 8 torrents while testing.

Thanks alot for all your help. you really did help me understand all this stuff.

[trogers]

that sux for now. cuz as broadband gets more avaialble and cheaper, more people will have symmetrical connections of 20mb+ . This area will have 150/150 soon for businesses. i'd love to do a speed test of that. probably will cap the download and upload of the test server.

i just did a test and :

Last Result:
Download Speed: 61253 kbps (7656.6 KB/sec transfer rate)
Upload Speed: 12415 kbps (1551.9 KB/sec transfer rate)

so im guessing the max upload that server (speakeasy TX) has is around 15-30 mb or something. And that was the speed while downloading like 8 torrents while testing.

Thanks alot for all your help. you really did help me understand all this stuff.

If your torrent program is running during your speed tests, it is consuming part of your upload bandwidth.

Also, set limits into your torrent program - limit max. no. of connections to 100, and limit global upload speed to 75% of what your ISP gives you.