rwin setting

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 12:33 am

i set my rwin setting lower down to 64240 and my speed went up about 10k/sec any idea why? also can anyone explain how to get the rwin # what the calculation is exactly

lance-tek · Post by **lance-tek** » Tue May 29, 2001 12:53 am

sometimes on some servers a smaller number is better, when you use a scaled RWIN adn the server does not then they meet at the lowest which would prolly be the server's. By lowering yours you have gotten inside of the servers parameters which allows you to transfer at your speed. as opposed to finding an agreeable RWIN for you and the server due to using a multiple

I think i said that all the right way, haha it has been a long day

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 1:02 am

lobo i used 60648 do you know any others that are low that might also work?

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 1:16 am

or lance rather (sorry about that lance just used to lobo being the only one to answer)

lance-tek · Post by **lance-tek** » Tue May 29, 2001 1:26 am

lobo is the king of RWIN and he won't be back for about 7 or 8 hrs. he measures it by CPU somehow I am not sure. but if you look around you can perhaps find some in other peeps postings that my work for you

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 6:37 pm

lobo did you have any thoughts on this?

Lobo · Post by **Lobo** » Tue May 29, 2001 6:42 pm

I still love big fat juicy RWIN's even though some like the small one's if you tell me your system specs I'll recommend some, you can of course use whichever you wish

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 6:44 pm

pIII 1gig 128meg ram 30gig WD 7400rpm geforce2 hercules 32meg

Lobo · Post by **Lobo** » Tue May 29, 2001 6:50 pm

WOW a big daddy, OK, try 524176, 522680, 544800 the one for 1 GiG's

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 7:10 pm

the thing is lobo i have tried the higher settings, but when i put in a lower one i actually saw a increase in speeds.
any thoughts on why?

Lobo · Post by **Lobo** » Tue May 29, 2001 7:23 pm

What kind of speed are you getting and our you using proxy server and are you rebooting after putting in new RWIN and checking analyzer to make sure RWIN is in, what OS are you on and do you have adjuster

Lobo · Post by **Lobo** » Tue May 29, 2001 7:28 pm

I'm quessing but you need to set TcpOpts to 1 to allow scalling

shaddaddy · Post by **shaddaddy** » Tue May 29, 2001 7:36 pm

Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0b; Windows 98)

TCP options string = 020405b40103030001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 60648
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 60648
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 2425.92 kbps (303.24 KBytes/s) @ 200ms
Your RcvWindow limits you to: 970.368 kbps (121.296 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

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

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

yes i reboot after settings
speeds = 256k/sec was best speed test i got last night

Lobo · Post by **Lobo** » Tue May 29, 2001 7:39 pm

Lets start from beginning, I went and saw other post and you are on 98SE, OK on desktop click on 4.0, then ccs, then cable, then fast 9x, OK, make GlobalmaxTcpWindowSize-BLANK, RWIN numbers above go in box that says DefaultRvcWindow, put one in after you take out 204400, one at a time try RWIN's till you find one you like, save to registry at bottom and reboot each time you change a value in adjuster

Lobo · Post by **Lobo** » Tue May 29, 2001 7:41 pm

Scaling is off in your test so everytime you changed RWIN it read as 65535 because scaling was not enabled, above will turn it on

Lobo · Post by **Lobo** » Wed May 30, 2001 11:12 am

Well, let us know what happened as we are worried about you

shaddaddy · Post by **shaddaddy** » Wed May 30, 2001 5:15 pm

well, i called rr and talked to a real smart lady *heh*
in any case i am calling back today to find out what they need to do. i have tried so many settings im running out of ideas. any thoughts on if the modem or nic card are bad, possibly the ethernet cable?