Is it possible to optimize ?

[dmerth]

SpeedGuide.net TCP/IP Analyzer

TCP properties for IP = 213.170.174.10 ()
Browser/OS = Mozilla/5.0 (Macintosh; U; PPC Mac OS X; de-AT; rv:1.0.0) Gecko/20020529
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405ac010303000101080a0000068500000000

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

MSS = 1452
Maximum useful data in each packet = 1440, which is less than MSS because of Timestamps, or other TCP/IP options used.
MSS is optimized for PPPoE DSL broadband. If not, consider raising MTU to 1500 for maximum throughput.

Default Receive Window (RWIN) = 63360
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 63360
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
511104 (MSS x 44 * scale factor of 8)
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 2534.4 kbps (316.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1013.76 kbps (126.72 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 47 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = OFF

IP type of service field (RFC1349)= 00000000

Apple Macintosh G4 , MacOS 10.1.5

ADSL using PPPoE

tried to set Default Receive Window (RWIN) to 63888 find then 64800.
Can anybody tell what to do ?

Thank you
dmerth

[mnosteele52]

What are your ISPs caps? What kind of speeds are you getting with the settings you posted?

[dmerth]

Speed in Germany:
606,9 kilobits/sec
74,1 kilobytes/sec

What are "ISP Caps"? sorry no expert.
dmerth

[mnosteele52]

What we need to know is what your ISP advertises as there maximum download speed. Also your profile says you have a Mac is that correct? If not what OS are you using?

[dmerth]

I am using a Mac PPC G4, MacOS 10.1.5

will soonest come back with figures for up- and download
than you

dmerth.

[mnosteele52]

Well I know nothing about Macs, I can't help you tweak anything. Maybe someone else knows something, sorry.

[dmerth]

Here the figures:

EWETEL, a local Telephone Comp.

768 kbit/sec Upstream
128 kbit/sec Downstream

thank you
dmerth

[mnosteele52]

Try the following RWINs 18876/27588/47916 but I have no idea how to change them.

[mccoffee]

http://www.sustworks.com/site/prod_ottuner.html here is the mac stuff you need to bad u you have to pay for it.

[Lobo]

I don't know how to change but you have timestamps on when they need to be off, you now have TCP1323Opts set to 3, needs to be set to 1

[mccoffee]

http://www.newnan.cc/cable.html#MacWindow this is it i found it check it out

[dmerth]

Thank you all.

have found Sustainable Softworks in the meantime.

RFC1323 is on 1, (= on (?))

will try given RWIN numbers.


still trying

Thank you dmerth