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Unstable DSL

Posted: Thu Jan 30, 2003 9:28 am
by techopsTM7
TCP properties for IP = 65.80.XXX.XXX (adsl-80-XXX-XXX.bna.bellsouth.net)
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405ac01010402

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 = 1452, which equals MSS.
MSS is optimized for PPPoE DSL broadband. If not, consider raising MTU to 1500 for maximum throughput.

Default Receive Window (RWIN) = 65535
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 65535
Note: Under Windows 9x, if you have RWIN set to any other value, and the Analyzer reports 65535 you might need to install the MS Vtcp386 fix.
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: 2621.4 kbps (327.675 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1048.56 kbps (131.07 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 52 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000




5967147 connections tested since 03.10.2001.

Analyzer version: 1.02 - updated 09.20.2002.

2003-01-30 09:27:01 EST: 1204 / 220
Your download speed : 1204735 bps, or 1204 kbps.
A 147 KB/sec transfer rate.
Your upload speed : 220385 bps, or 220 kbps.
Seems like broadband .. above the 1mbit barrier!

DSL is pretty unstable and conn speed came down. I am using your tweaks there any setting that i must make to get better?

Posted: Thu Jan 30, 2003 12:09 pm
by mccoffee
http://www.speedguide.net/files/vtcp386/236926USA8.EXE download and install this then take the tcpip analyzer one more time just like u did the post above thank u also make sure u reboot u need that patch to give right rwin

Posted: Thu Jan 30, 2003 5:45 pm
by techopsTM7
TCP properties for IP = 66.20.xxx.xxx (adsl-20-xxx-xxx.bna.bellsouth.net)
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405ac0103030201010402

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 = 1452, which equals MSS.
MSS is optimized for PPPoE DSL broadband. If not, consider raising MTU to 1500 for maximum throughput.

Default Receive Window (RWIN) = 255552
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 63888
RWIN is 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)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 10222.08 kbps (1277.76 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4088.832 kbps (511.104 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 52 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000


what is the difference?

Posted: Thu Jan 30, 2003 6:51 pm
by mccoffee
ok looking better i say try lower ur rwin a little it's kind high other then that doing good

Posted: Thu Jan 30, 2003 6:54 pm
by mccoffee
dsl likes lower rwins

try thease one at a time and make sure you don't have a check mark for window scaling 33396 43560 46464
have window scaling checked on that one 66792

Posted: Thu Jan 30, 2003 8:12 pm
by mnosteele52
Use 63888 for your RWIN. :)

Posted: Fri Jan 31, 2003 12:59 am
by drewwpb
How is your DSL unstable ? Just to let you know Bellsouth is still in the middle of a major rerouting issue. It has created high pings and unstable connections from most BS users... Bellsouth has created a BRIB (BellSouth Regional IP Backbone) , they say that it will make the BS Network very fast when all the bugs get worked out...Here are 2 posts that should give you all the info you want , the 2nd link is very long 670 posts....

Current BRIB Info

Why the new Route

Drew...