Tweak Settings

cesium · Post by **cesium** » Sun Nov 30, 2003 3:20 pm

Hm...

I used to have Comcast 1500/128 cable
So I optimized my settings in CableNut for it

But recently, I changed to Comcast 3000/200...
All for the same price...

So I was wondering if I could get the setting for these new speeds.

Here are the TCP/IP results:

TCP properties for IP = ()
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)
Notes: Read the Analyzer FAQ if the above is not your IP address.

TCP options string = 020405ac010303000101080a000000000000000001010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
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 = 49 hops

TTL value is ok.
Timestamps (RFC1323) =
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) = 01011100

Precedence (priority) = 100 (flash override)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 1 (low cost)

P.S. Is it good to have both CableNut and TCP/IP Optimizer?? Or only one?

Also, it shows the MTU and MSS as being optimized for PPPoE DSL, which I do not have, I used to though...
Should I change the settings to 1500 then?

mnosteele52 · Post by **mnosteele52** » Sun Nov 30, 2003 3:33 pm

Yes change your MTU to 1500, remove any PPPoE software you have on your pc. Once you set it right we can optimize the rest of your settings.

cesium · Post by **cesium** » Sun Nov 30, 2003 9:15 pm

Ok, thats all done...

Now what?

mccoffee · Post by **mccoffee** » Mon Dec 01, 2003 4:04 am

Try the following in cablenut which is below me

DefaultReceiveWindow = 230400
DefaultSendWindow = 32768
DisableAddressSharing = 1
InitialLargeBufferCount = 100
InitialMediumBufferCount = 240
InitialSmallBufferCount = 320
LargeBufferSize = 81920
MaxFastTransmit = 64000
MediumBufferSize = 15040
PriorityBoost = 0
SmallBufferSize = 1280
TransmitWorker = 32
FastSendDatagramThreshold = 4096
EnableFastRouteLookup = 1
EnablePMTUDiscovery = 1
IgnorePushBitOnReceives = 0
GlobalMaxTcpWindowSize = 64240
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0 (set to 1 if TcpReceiveWindow is 65535 or higher)
TcpLogLevel = 1
TcpMaxDupAcks = 3
TcpMaxHalfOpen = 100
TcpMaxHalfOpenRetried = 80
TcpRecvSegmentSize = 1460
TcpSendSegmentSize = 1460
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 64240
MaxConnectionsPer1_0Server = 20
MaxConnectionsPerServer = 10
DefaultTTL = 64
DisableUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 92

cesium · Post by **cesium** » Mon Dec 01, 2003 2:54 pm

Lol,
You posted the same info thrice

Currently my average speed is: 290

wonder what it is after

cesium · Post by **cesium** » Mon Dec 01, 2003 3:12 pm

Hm....

Didn't go up much

Average after tweaks: 293

Only 3 kbps difference...

Oh well, best it is

Thanks

mnosteele52 · Post by **mnosteele52** » Mon Dec 01, 2003 5:37 pm

cesium please post a current TCP/IP Analyzer test.

mccoffee · Post by **mccoffee** » Mon Dec 01, 2003 6:24 pm

OOps i think at the time sg was saying something about posting every 15 secs during that time i may have already posted without knowin it.

cesium · Post by **cesium** » Mon Dec 01, 2003 8:13 pm

OK, here are the results:

TCP properties for IP = XX.XX.XX.XXX ()
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)
Notes: Read the Analyzer FAQ if the above is not your IP address.

TCP options string = 020405b401010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals 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) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 01011100

Precedence (priority) = 100 (flash override)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 1 (low cost)

mccoffee · Post by **mccoffee** » Tue Dec 02, 2003 1:20 am

your speed is fine if you are capped at 1800 the most you should see is 225kbs

cesium · Post by **cesium** » Tue Dec 02, 2003 2:59 pm

Ok, thanks

Just wondering, what would be my average upload speed?

mccoffee · Post by **mccoffee** » Tue Dec 02, 2003 3:47 pm

20-30kbs

cesium · Post by **cesium** » Wed Dec 03, 2003 3:56 pm

Originally posted by cesium
your speed is fine if you are capped at 1800 the most you should see is 225kbs

What do you mean by me being capped at 1800,
Am I not capped at 3000?

Sorry for being a pester...

mccoffee · Post by **mccoffee** » Wed Dec 03, 2003 4:32 pm

Well if you got the new upgrade yep you will be at 3000 meg but according to ur speed test i'm guessing you didn't get the upgrade yet it's not suppose to be done untill xmas time maybe later. so you are capped at 1800/256 you should get a notice about the upgrade when you do come back here for new settings.

cesium · Post by **cesium** » Wed Dec 03, 2003 10:09 pm

That's the weird thing.

I got an e-mail from comcast saying that I recieved the upgrade a few days ago. All I had to do was power-cycle my modem once...

I did notice a speed upgrade though, so that means they didn't upgrade my speed to 3000, but only 1800???

Thats a rip

mccoffee · Post by **mccoffee** » Thu Dec 04, 2003 3:53 am

yep you could try truning the modem off then on and see if you could get the three try it.