Check settings plz

[JeffL]

Lets see, Win98SE, PIII 450mhz, AOL high speed (rrr...)

MTU = 1400
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1360
Maximum useful data in each packet = 1360, which equals MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 65535
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 65535
Note: Under Windows 9x, if you have RWIN set to any other value, and the Analyzer reports 65535 you might need to install the MS Vtcp386 fix.
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
522240 (MSS x 48 * scale factor of 8)
261120 (MSS x 48 * scale factor of 4)
130560 (MSS x 48 * scale factor of 2)
65280 (MSS x 48)

bandwidth * delay product:
Your RcvWindow limits you to: 2621.4 kbps (327.675 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1048.56 kbps (131.07 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 56 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000


Will install the VTCP386 fix, if it will work past AOL. MTU adjusted to 1500, won't go past AOL.

Have 2000/384 cable.

Speed test from Atlanta Speakeasy:

your
download «1529 kbps

your
upload «331 kbps

--Upload ok, download not okay. All help appreciated.

[JeffL]

Ok Vtcp update installed, fixed Rcvwin value.

Set to 256960 now. Look good?

New speedtest run.

your
download «1655 kbps
your
upload «340 kbps

Improvement marginal.

[MadDoctor]

Okay. Now that you have the update in... post the results of the TCP/IP Analyzer again. Lets see where you are.

:)

[JeffL]

Heres the latest from the analyzer:

MTU = 1400
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1360
Maximum useful data in each packet = 1360, which equals MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 256960
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 64240
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
522240 (MSS x 48 * scale factor of 8)
261120 (MSS x 48 * scale factor of 4)
130560 (MSS x 48 * scale factor of 2)
65280 (MSS x 48)

bandwidth * delay product:
Your RcvWindow limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 56 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

[MadDoctor]

Good Job!!!! That's what you want to see! You might want to run a speed test to see how those upload/download speeds are.

AOL is strange... so you might need a minor tweak here or there but you did real good.

[mnosteele52]

Actually JeffL with AOL your MSS is 1360 so you need to make your RWIN a multiple of that. Also with AOL's caps you might try RWINs of 29920, 47600, 59840, 89760 or 119680.:) ;)

[MadDoctor]

Thanks mnosteele52. I was starting to get in over my head with tweaking AOL...



:)

[JeffL]

Ok thanks.

[MadDoctor]

This is what you got before:

Speed test from Atlanta Speakeasy:
your download «1529 kbps
your upload «331 kbps

How are you doing now?

[JeffL]

This is what I get now:

your
download «1772 kbps

your
upload «330 kbp


Gonna try increasing my RWIN again a bit larger, see if that does anything, I'm using the second largest that mnosteele52 put up.

Its also thundering out, maybe that is affecting cable performance too...hehe.

[JeffL]

Heres the latest:

your
download «1840 kbps

your
upload «358 kbps


MTU = 1400
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1360
Maximum useful data in each packet = 1360, which equals MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 119680
RWIN Scaling (RFC1323) = 1 bits
Unscaled Receive Window = 59840
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
522240 (MSS x 48 * scale factor of 8)
261120 (MSS x 48 * scale factor of 4)
130560 (MSS x 48 * scale factor of 2)
65280 (MSS x 48)

bandwidth * delay product:
Your RcvWindow limits you to: 4787.2 kbps (598.4 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1914.88 kbps (239.36 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 55 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000



So things look good. I am with 90% of advertised bandwith (2000/384)

Wondering if I can't still improve...according to this line in TCP analyzer:

Your RcvWindow limits you to: 1914.88 kbps (239.36 KBytes/s) @ 500ms

Can I still improve that? What is the next highest RWin that will work?

[mnosteele52]

You can go try a higher RWIN but your speed looks awesome for your caps. Try 163200 or 195840, I think your pretty much maxed out and it looks like you have improved things a bit with your current RWIN, good luck.:)

[MadDoctor]

Well JeffL... you're ready to go play with the big dogs.

:)

[JeffL]

Ummm, interesting, under AOL 6 your are not limited to an MTU of 1400.

Deinstalling AOL 7 and installing AOL 6.

LOL

Will let you know if it works out.

[JeffL]

All of a sudden I am getting eradic readings from speed test.

We had a thunderstorm and it rained, hopefully I don't have a line that is sensitive to rain, that would suck.

[LuiKhang]

Just curious more for my sake, but since he is over 65535, would timestamps give him a little boost?

[JeffL]

Worth a try...