downloads stall once in a while

undersc0re · Post by **undersc0re** » Sun Sep 03, 2006 9:26 am

I downloaded and installed the TCPOptimizer did all the tweaks, it is twice as fast now, but one problem now my downloads will stall once in a while, doesn't matter if I use IE6 or mozilla, the stalls get worse when I have multiple d/l going. It was fine forever until I did this. I have the cable modem and WinXP. Was there something I should not increase for cable modem if this happens? I searched for answers, but this seems to be more of a problem in the ppoe dsl. Thx

undersc0re · Post by **undersc0re** » Tue Sep 05, 2006 4:47 pm

It will almost always happen as follows, I have a download or 2 or 3 going, and I open a new page on the browser, or go back or something like that, and the downloads or download will just stall out. I can't seem to find anything out there to fix my problem.

YARDofSTUF · Post by **YARDofSTUF** » Tue Sep 05, 2006 4:58 pm

Sounds very odd. Have you run any adware scanners like adaware and spybot?

Also what did you set the Optimizer to, adn what is ur connection?

undersc0re · Post by **undersc0re** » Thu Sep 07, 2006 8:37 pm

Yes I ran the housecall scan, adware, symantec, windows defender, also my cable is so slow its like 50 kb/s most of the time. I will post what I got from the analyzer. The twice as fast speeds were there when I first tweaked it but they dimished when I played with the settings putting it back to the way it was. My connection is regular highspeed cable from SHAW in Canada, I run the regular pci ethernet card with a cat5 from the modem about 4 feet. I run WinXP with all the updates done. Everything is up to date, and it is a built in ethernet connection on the motherboard which is an ASUS K8NE4 Deluxe.

TCP options string = 020405b40103030001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.

Default TCP Receive Window (RWIN) = 64000
RWIN Scaling (RFC1323) = 0 bits
Unscaled TCP Receive Window = 64000

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values 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 (Note this is not a speed test):

Your TCP Window limits you to: 2560 kbps (320 KBytes/s) @ 200ms
Your TCP Window limits you to: 1024 kbps (128 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 59 hops
TTL value is ok.

Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 01011100 (92)
Precedence (priority) = 010 (immediate)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 1 (high reliability)
Cost = 0 (normal cost)
Check bit = 0 (correct, 8th checking bit must be zero)

DiffServ (RFC 2474) = No valid DiffServ equivalent. See the TCP Optimizer documentation, or RFCs 2474, 2475, 2597, 2598, 2873.

undersc0re · Post by **undersc0re** » Sat Sep 09, 2006 9:56 am

OK I noticed I had maybe 10 ports open when I start mozilla and maybe 4 open when I start IE, But when I start Live Messenger I get like 40 that open in netstat, maybe more. Is this normal, it almost seems like Micr0s0ft put spyware in my computer with this program. I would attach a prntscr shot of it but I do not know how. Any help would be appreciated, my speed issue was resolved as my provider was having a problem with they're router or something in the area I was in for the last week. I am just concerned with all of these ports that open with Live Messenger....thx.

YARDofSTUF · Post by **YARDofSTUF** » Sat Sep 09, 2006 11:06 am

Well I dont think it'll help with your current problem, but change your RWIN to 64240.

I'm not familiar with how live messenger works. With it on do the SG Security Scanner test in the broadband/broadband tools menu.

I'm curious if its opening the ports or if its just using them.

Do you have a router or firewall?

undersc0re · Post by **undersc0re** » Sat Sep 09, 2006 1:08 pm

No router and just sygate as firewall.

Sava700 · Post by **Sava700** » Sat Sep 09, 2006 1:50 pm

sounds like you have something fighting with the browsers... got drivers installed if your running a dual core setup? All other drivers installed? Updated all your microsoft updates/windows updates?

undersc0re · Post by **undersc0re** » Sun Sep 10, 2006 9:43 pm

Ok my connection has speeded up. I phoned and complained, it seemed to get faster, they advertise a 5 mbit d/l and 1 mbit upload, so I did a speed test for them and got 2 mbit, which is the fastest I can get lately (last week) and they said thats fast enough. I told them its half of what I used to get but he said he can't explain why it was so fast before and that the 5 mbit claim is for excellent conditions only. SO I dunno, I did the spysweeper housecall and symantec virus scan and all those to clean up the computer, but it did nothing, is there a ping utility or something to trace where the packets are slowing down or something of the sort? I just want to know where the bottleneck is, I will post my analysis below again and maybe it can shed a bit of light. The scan I did on this site just showed a bunch of green filtered? udp ports nothing crazy. I am also adding a ping analyze copy and paste under it.

TCP options string = 020405b40103030001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.

Default TCP Receive Window (RWIN) = 64240
RWIN Scaling (RFC1323) = 0 bits
Unscaled TCP Receive Window = 64240

RWIN is a multiple of MSS
Other RWIN values 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) <-- current value

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2569.6 kbps (321.2 KBytes/s) @ 200ms
Your TCP Window limits you to: 1027.84 kbps (128.48 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 59 hops
TTL value is ok.

Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 01011100 (92)
Precedence (priority) = 010 (immediate)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 1 (high reliability)
Cost = 0 (normal cost)
Check bit = 0 (correct, 8th checking bit must be zero)

DiffServ (RFC 2474) = No valid DiffServ equivalent. See the TCP Optimizer documentation, or RFCs 2474, 2475, 2597, 2598, 2873.

Ping Results:PING 24.76.2.* (24.76.2.*) 56(84) bytes of data.

--- 24.76.2.* ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4044ms

Traceroute Results: 1 63-217-30-94.pccwbtn.net (63.217.30.94) 0.343 ms 0.340 ms 0.260 ms
2 ge12-2.br02.ash01.pccwbtn.net (63.218.44.126) 0.321 ms 0.302 ms 0.295 ms
3 rt0as-equinix.vx.shawcable.net (206.223.115.20) 0.635 ms 0.866 ms 0.627 ms
4 rc2as-ge2-0-0.vx.shawcable.net (66.163.64.2) 0.452 ms 0.852 ms 0.591 ms
5 rc2ch-pos2-0.il.shawcable.net (66.163.77.65) 25.596 ms 26.034 ms 25.437 ms
6 rc2nr-pos10-0-0.wp.shawcable.net (66.163.77.93) 43.690 ms 43.730 ms 43.695 ms
7 S0106000f66c075b5.wp.shawcable.net (24.76.2.1) 44.949 ms 46.009 ms 45.229 ms
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