How to increase the Default Receive Window(RWIN)

[Ginkoz]

I think i used to have like 33xxxx before. Somehow it dropped down to currently 256960. Can anyone help? thanks :P

TCP options string = 020405b40103030201010402

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) = 256960
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 64240
RWIN is 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)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

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 = 116 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

[Lobo]

What size CPU and ammount of RAM do you have and do you have Cablenuts adjuster:)

[Ginkoz]

PIII 450 slot one. 640sdram @home cable, i didn't have Cablenut, for some unknown reason, cablenut tweak slow down my connection to sub 1000kbs after i applied along with all the speednet and @home patches.

[Lobo]

You need atleast 64 more megs of RAM but try these RWIN's :
348720, 373760 or 385440:) :)

[Ginkoz]

That's what i got now. Unable increase to 348720, it caused the retransmission.

One more question, should my Unscaled Rw =64240????
I set it on Cablenut as 64240, but it still turn out to be 40150. Give me some opinions.
Thanks :P


TCP options string = 020405b40103030301010402

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) = 321200
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 40150
RWIN is 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: 12848 kbps (1606 KBytes/s) @ 200ms
Your RcvWindow limits you to: 5139.2 kbps (642.4 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 36 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

[Lobo]

I don't pay much attention to dslr's retransmissions, as if you stay there and take test after test you get different reading each time, plus internet is messed up with the virus out there, buy more RAM if you want better speed:)

[HalfLifer]

Originally posted by Lobo
You need atleast 64 more megs of RAM but try these RWIN's :
348720, 373760 or 385440:) :)


LMAO!

You can use those RWINS without the extra RAM, dont let Lobo trick you.

My P2 400 has 64mb ram and runs the 513920 RWIN!

[MadDoctor]

Why would Lobo want to trick someone?

[Lobo]

He's got a router or ICS going thru that big CPU of his, he's a lamer, I mean gamer, does not care about download speed anymore

[HalfLifer]

Hey Lobo,

Im not a lamer. I have a 1.2ghz Tbird because I built my own machine and I had the money.

I run both machines thru a HUB, not a router. So dont give me that BS.


MadDoctor,

Because he didnt learn it right, IM trying to teach him the RIGHT ways but he aint listening.


P.S,

And to say I dont care about download speed anymore, I do test mine all the time. 513920 works great here, and on my P2 400mhz machine :p

[Lobo]

I sure am not listening to a 15 year kid, now after all these years, system specs don't matter, your wrong dude, my 750 downloads alot faster than my old 500, well it's about time for me to surf, good day Halflife

[HalfLifer]

Lobo, forget that Im 15, so you dont have an excuse to not listen to me.

250mhz wont mean jack lobo. Trust me. a 400mhz can handle way past 10mbps.