Please help tweak!

AMDbeginner · Post by **AMDbeginner** » Sun Dec 08, 2002 11:07 am

SpeedGuide.net TCP/IP Analyzer
TCP properties for IP = xxx.xx.xx.xxx
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Note: Read the FAQ if the above is not your IP address.

TCP options string = 0204059801010402

MTU = 1472
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1432
Maximum useful data in each packet = 1432, 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) = 2864
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 2864
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
504064 (MSS x 44 * scale factor of 8)
252032 (MSS x 44 * scale factor of 4)
126016 (MSS x 44 * scale factor of 2)
63008 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 114.56 kbps (14.32 KBytes/s) @ 200ms
Your RcvWindow limits you to: 45.824 kbps (5.728 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.

MTU Discovery (RFC1191) = ON

Time to live left = 109 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00101000
Precedence (priority) = 001 (priority)
Delay = 0 (normal delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 0 (normal cost)

I am on a static ip..
i use windows xp.. my modem is arescom netDSL 1000 series..
i use an ethernet connection between the modem and my comp..
thanks

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 11:50 am

OK first you need to set your MTU properly, I assume this is a PPPoE DSL connection, are you using your ISPs software or XPs native setup?

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 1:57 pm

nope.. no pppoe
.. static ip.. when my computer turns on.. i'm connected to internet.

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 1:59 pm

OK then your MTU should be 1500, see if the fixes in my Help & Tips link help.

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 2:06 pm

What about TCP?

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 2:08 pm

Originally posted by AMDbeginner
What about TCP?

What do you mean? First your MTU needs to be right before anything else.

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 2:32 pm

2002-12-09 14:31:04 EST: 514 / 197
Your download speed : 514983 bps, or 514 kbps.
A 62.8 KB/sec transfer rate.
Your upload speed : 197677 bps, or 197 kbps.

Those were my results after changing MTU.
Advertised speeds were 512/256

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 2:39 pm

OK can you please post a TCP/IP Analyzer test and what are your ISPs caps?

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 2:46 pm

SpeedGuide.net TCP/IP Analyzer
TCP properties for IP = ~~~~~~~~~~
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405980103030201010402

MTU = 1472
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1432
Maximum useful data in each packet = 1432, 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) = 2864
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 716
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
504064 (MSS x 44 * scale factor of 8)
252032 (MSS x 44 * scale factor of 4)
126016 (MSS x 44 * scale factor of 2)
63008 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 114.56 kbps (14.32 KBytes/s) @ 200ms
Your RcvWindow limits you to: 45.824 kbps (5.728 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.

MTU Discovery (RFC1191) = ON

Time to live left = 45 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00101000
Precedence (priority) = 001 (priority)
Delay = 0 (normal delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 0 (normal cost)

5192244 connections tested since 03.10.2001.

Analyzer version: 1.02 - updated 09.20.2002.

Seems like MTU didn't change :s
i used tcp optimizer

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 2:51 pm

Originally posted by AMDbeginner
Seems like MTU didn't change :s
i used tcp optimizer

That's why I asked you to try the suggestions in my Help & Tips link.

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 3:23 pm

hm.. dude.. i can't seem to change MTU:s still by reading ur help..

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 3:30 pm

Try manually setting it in your registry in the following location:

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<interface>

DWORD value of 5dc (which will make it 1500).

MTU=1500

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 3:34 pm

the setting was placed liek that from before

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 3:37 pm

OK looking back through some older threads I found this one, did you change your connection? If so who is your ISP now?

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 3:41 pm

i use the same isp.. just htat i changed from dynamic ip to static
same plan and everything..
my isp is a chilean one.. called GTD..
i live in south america.

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 3:43 pm

are there different settings for static and dynamic ip.. even if the plans are different?

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 3:51 pm

OK from reading your other thread I think you left out some important information..... are you using a router? You said you have a server, is this pc running through another one to access the internet?

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 3:52 pm

nope
this comp IS ther server.
so.. directly connected to net.

mnosteele52 · Post by **mnosteele52** » Mon Dec 09, 2002 3:55 pm

OK but are you using ICS to share the connection with other pcs? If so I think that's what is messing up your MTU, you need to set your ICS MTU to 1480.... I believe it should be 1480 even though you have a static IP.

AMDbeginner · Post by **AMDbeginner** » Mon Dec 09, 2002 4:04 pm

ok
so.. MTU 1480.. got it