poor cable d/l speed

seeker_of_knowl · Post by **seeker_of_knowl** » Mon Mar 18, 2002 1:09 pm

where do i begin? i have been on cable for about two weeks. lost over half the speed i had with dsl(moved). called and complained about d/l speed, got the run around about gaurenteed minimums. requested half price, which was granted due to lack of mentioning from sales rep. when i test d/l at dslreports it says i get a d/l speed of 1470. when i d/l at all the other places it says i d/l at the average of 345 Kbps. transfer rate on d/l's is average of 43KB/sec. i am very frustrated after having much better speeds with dsl. like i said my speed dropped over half. i'm stuck with cable cuz dsl doesn't come here to where i moved. i am throwing up one last ball of hope that i can be helped here.
Receive Window (RWIN): 256960
Window Scaling: 2
Path MTU Discovery: ON
RFC1323 Window Scaling: ON
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL: unknown
TTL remaining: 52

Notes and recommendations:
Choose RWIN between 14600 and 37960 (FAQ #586)
download/use DRTCP .. (FAQ #578)
Read the tweak FAQ

Example 146000 byte download
Actual data bytes sent: 167900
Actual data packets: 115
Max packet sent (MTU): 1500
Max packet recd (MTU): 1500
Retransmitted data packets: 15
sacks you sent: 36
pushed data pkts: 2
data transmit time: 0.605 secs
our max idletime: 137.1 ms
transfer rate: 153649 bytes/sec
transfer rate: 1229 kbits/sec
This is not a speed test!
transfer efficiency: 86%

TCP options string = 020405b40103030201010402

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

bandwidth * delay product:
Your RcvWindow limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

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

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

hope this isn't too much info at once, thanks in advance
seeker_of_knowledge

glc1 · Post by **glc1** » Tue Mar 19, 2002 12:50 am

First of all, is your service capped?

And have you applied any of the patches/are those the defaults settings that you have listed or settings that you have made?

seeker_of_knowl · Post by **seeker_of_knowl** » Tue Mar 19, 2002 2:31 am

these are the patched settings

glc1 · Post by **glc1** » Tue Mar 19, 2002 11:43 am

Originally posted by seeker_of_knowl
these are the patched settings

OK, and did they improve your connection at all?

Where are you testing your connection? Make sure your not mixing up bit and bytes. Most speed testing sites measure in bits while web browsers show transfers as bytes.

JFYI, you will not be able to exceed any caps.

seeker_of_knowl · Post by **seeker_of_knowl** » Wed Mar 20, 2002 1:35 am

i got it taken care of, thanks d/l speeds are 1.9 mbps
had to go back to win 98

glc1 · Post by **glc1** » Wed Mar 20, 2002 2:02 am

Originally posted by seeker_of_knowl
i got it taken care of, thanks d/l speeds are 1.9 mbps
had to go back to win 98

What OS were you previously running?

seeker_of_knowl · Post by **seeker_of_knowl** » Wed Mar 20, 2002 2:07 am

was in win2k my ethernet card isn't compatible with it.
netgear is make fa311 is the model

Cable_Dood · Post by **Cable_Dood** » Wed Mar 20, 2002 10:15 am

I thought that you would get a lot of retransmission if your RWIN is that big. Also, I was under the impression that the maximum RWIN value recognized in win2k was 65535?

seeker_of_knowl · Post by **seeker_of_knowl** » Wed Mar 20, 2002 11:33 am

this is the test after going back to win98,

thanks for your responses

TCP options string = 020405b401010402

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) = 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:
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:
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 = 115 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

glc1 · Post by **glc1** » Wed Mar 20, 2002 3:27 pm

Originally posted by seeker_of_knowl
was in win2k my ethernet card isn't compatible with it.
netgear is make fa311 is the model

Wouldn't it have been easier to get a different NIC?

seeker_of_knowl · Post by **seeker_of_knowl** » Sat Mar 23, 2002 6:55 pm

bro, i reformatted and left out the tweaks and win2k is now allowing me to transfer at the 1.9mbps barrier. it wasn't the win2k issue with my nic after all, it was the fact that i couldn't fully remove the tweaks from my registry. i have been advised not to add the tweaks to my system, being that is what was causing the poor d/l speed. i can't explain it, with the tweaks i only was able to transfer a d/l at 44KB per sec.... i reformatted and left the tweaks off and now have a d/l transfer rate of 233kb per sec.

and yes, i did run the auto restore to default settings. even tried manualy changing them to and deleting the tweaks.

can't figure it out but i'm not interested in figuring it out, i got what i wanted by removing the tweaks.

i can understand if anyone feels they need to defend the tweaks, but i wish not to engage in any conflicts, i found the solution to my problem.

thanks for all you guys's help

seeker_of_knowl · Post by **seeker_of_knowl** » Sat Mar 23, 2002 6:57 pm

the 233 kb was a typo it is 233KB

glc1 · Post by **glc1** » Sat Mar 23, 2002 7:17 pm

Yeah, the tweaks don't work for everyone, but do for the majority. I'm not using any right now, but I'm also hitting my cap (768 SDSL). Back when I had cable and residential DSL, I didn't use them either and was always able to hit my cap (in case of the DSL) or the tweaks made no difference (in case of the cable).