windows 2000 mtu

[bryguy5]

I am running windows 2000 pro and have dsl using enternet 300 and pppoe i have installed the patch from speed guide to raise my mtu to 1492 and have also manually checked the setting, but when i run a tweak test it shows that my mtu is 1486. where in the registry can this be changed. any help would be apprieciated thanks in advance

bryguy5

[MadDoctor]

Post your results from the analyzer. Oh ya… remove your IP number before you post the results.

[bryguy5]

here are thew results what do you think


TCP options string = 020405a60103030201010402

MTU = 1486
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1446
Maximum useful data in each packet = 1446, which is equal to MSS.

Default Receive Window (RWIN) = 254496
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 63624
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
508992 (MSS x 44 * scale factor of 8)
127248 (MSS x 44 * scale factor of 2)
63624 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 10179.84 kbps (1272.48 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4071.936 kbps (508.992 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = OFF

Time to live left = 51 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

[MadDoctor]

Good job. Your MTU is not 1492 (just take a peek at your results. They say it is 1486). Perhaps your patch is not in???

[bryguy5]

i have reinstalled the patch but i dont think it changes the mtu.i have read how to change the mtu and did and then restarted but still shows up as 1486 do you know how or where to change this i have checked every where that i know but there must be some where else if it keeps reporting 1486 any help would be nice thanx in advance

bryguy5

[MadDoctor]

I'm not a DSL guy so the help I can give you is limited. Evil is "the man" when it comes to DSL. Not sure if he's around right now but you can read some of the posts from today and last month and see if you can read something that will apply to you.

Good Luck!

[cyberskye]

Are we behind a router? I think that was my MTU before I upgraded firmware on my Linksys 4-port

[bryguy5]

no im not behind a router any other idea

[[fastdetect]]

exact thing here ..haven't you heard? DSL connections (PPPoE) can only be optimized up to 1492 i read it somewhere , it is impossible to get it over 1492....

[mnosteele52]

Download TCPOptimizer and choose DSL PPPoE and see if it changes your MTU.:) ;)

[UnitedWeStand]

Originally posted by bryguy5
I am running windows 2000 pro and have dsl using enternet 300 and pppoe i have installed the patch from speed guide to raise my mtu to 1492 and have also manually checked the setting, but when i run a tweak test it shows that my mtu is 1486. where in the registry can this be changed. any help would be apprieciated thanks in advance

bryguy5
I can see your quite knew to Speedguide.net.. but if you have time to read a thread posted by me you will understand your situation as I understand mine... Click this link (http://forums.speedguide.net/showthread.php?s=&threadid=73349)

[Tassie_Devils]

Here are my results.....

any comments... I am new to this.....

TCP options string = 020405b4010303000101080a000000000000000001010402

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) = 64240
RWIN Scaling (RFC1323) = 0 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)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)

bandwidth * delay product:
Your RcvWindow limits you to: 2569.6 kbps (321.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1027.84 kbps (128.48 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 49 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) = ON

IP type of service field (RFC1349)= 00000000

:)

[Lobo]

Time stamps need to be off, whose patch or patches

[Lobo]

If you need help please click on profile in one of your posts and fill in so we know what you have, thanks, it's alot easier to click on profile for me to see where your from, OS, system specs to help me help you, thanks again


And please start your own thread, thank you:) :)