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Comcast speed - suggestions?


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Hi - I had comcast 3/down, and recently upgraded to 6/down (and got their cable- they are coming any minute to install the tv service). However, my line speed has really not increased, and i'm wondering if there is anything i can do to increase it. This is the result from the line test on my connection - wireless pci adapter - I had to use the flat test. [[Results

:::.. Download Stats ..:::

Connection is:: 1242 Kbps about 1.24 Mbps (tested with 3151 kB)

Download Speed is:: 152 kB/s

Tested From:: http://www.bafserv.com

Test Time:: 2006/05/04 - 11:54am

Bottom Line:: 22X faster than 56K 1MB Download in 6.74 sec

Tested from a 3151 kB file and took 20.781 seconds to complete

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 1.1.4322)

Diagnosis: May need help : running at only 24.88 % of your hosts average (comcast.net)

Validation Link:: https://testmy.net/stats/id-IS65P9GLZ

]]]

I pay for comcast 6down, and know the wireless pci causes significant loss in speed (especially since it is AT&T pci adapter, total trash) albeit my hardwired computer, (I unplugged the router and conected directly to the modem) will not exceed ~4.2mpbs. I have a modem that is probably 2 years old, branded comcast (WebSTAR DPC2100) and am wondering if the speed lost is from my end, due to the modem not being capable of these speeds, or if it is due to the actual line itself. I'm thinking about upgrading to the Surfboard SB5120, and wondering if there are suggestions?

Interestingly enough, I've run the NDT test thru nitro.ucsc.edu to check for duplex mismatches, but everything seems to check out ok - and my speeds appear much higher there on my pci adapter. I'll post up my results here. Note that all values are for the wireless computer (802.11b/g AT&T PCI adapter!) 

------  Web100 Detailed Analysis  ------

Cable modem/DSL/T1 link found.

Link set to Full Duplex mode

No network congestion discovered.

Good network cable(s) found

Normal duplex operation found.

Web100 reports the Round trip time = 38.77 msec; the Packet size = 1452 Bytes; and

No packet loss - but packets arrived out-of-order 0.13% of the time

This connection is receiver limited 97.94% of the time.

This connection is network limited 2.03% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:

RFC 2018 Selective Acknowledgment: ON

RFC 896 Nagle Algorithm: ON

RFC 3168 Explicit Congestion Notification: OFF

RFC 1323 Time Stamping: OFF

RFC 1323 Window Scaling: OFF

Information: Network Middlebox is modifying MSS variable

Server IP addresses are preserved End-to-End

Information: Network Address Translation (NAT) box is modifying the Client's IP address

Server says [69.xx.xx.xx] but Client says [192.168.1.100]

estimate = 285.74 based on packet size = 11Kbits, RTT = 38.77msec, and loss = 1.0E-6

The theoretical network limit is 285.74 Mbps

The NDT server has a 101.0 KByte buffer which limits the throughput to 20.35 Mbps

Your PC/Workstation has a 17.0 KByte buffer which limits the throughput to 3.42 Mbps

The network based flow control limits the throughput to 3.71 Mbps

Thanks!

>>>>

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Guest echo

I would upgrade to the motorola surfboard modem. I have the Comcast 6Mbps as well with the motorola surfboard and i get anywhere from 6.2Mbps to 6.4Mbps without any tweaks. inface, tweaks don't do anything at all for me...i guess since i am actually getting faster speeds then i pay for. You should be able to take your old modem up to a Comcast center in your area and do a straight up trade as long as you are "renting" the modem from them ($3 a month).

If that doesn't work then I would have them check the lines and especially the drop (from the pole to your house). The drop is where most problems are...

Like you said, you will see a significant drop is speed if you are using WiFi.....I get 5.1mbps with my wifi laptop (with intel built-in centrino wireless modem)

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I also have Comcast 6meg and I've had to have Comcast out several times to fix the drop and they even had to move it twice. And I have the Surfboard SB5120 since I got that no problems in speed whatsoever. Just a few connection Interrupts in COD2 which Comcast has yet to fix.

:::.. Download Stats ..:::

Connection is:: 6273 Kbps about 6.27 Mbps (tested with 5983 kB)

Download Speed is:: 766 kB/s

Tested From:: https://testmy.net  (Server 1)

Test Time:: 2006/05/04 - 11:15pm

Bottom Line:: 109X faster than 56K 1MB Download in 1.34 sec

Tested from a 5983 kB file and took 7.813 seconds to complete

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)

Diagnosis: Awesome! 20% + : 25.64 % faster than the average for host (comcast.net)

Validation Link:: https://testmy.net/stats/id-2MEP04ZYB

:::.. Upload Stats ..:::

Connection is:: 366 Kbps about 0.37 Mbps (tested with 579 kB)

Upload Speed is:: 45 kB/s

Tested From:: https://testmy.net  (Server 1)

Test Time:: 2006/05/04 - 11:08pm

Bottom Line:: 6X faster than 56K 1MB Upload in 22.76 sec

Tested from a 579 kB file and took 12.97536 seconds to complete

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)

Diagnosis: 90% + Okay : running at 98.39 % of your hosts average (Comcast.net)

Validation Link:: https://testmy.net/stats/id-AMS8HOCRZ

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wOOt I just upgraded to gamer package and this is the results. Also make Comcast get out there and check your drop that is most likely the problem or they haven't changed your service like they said.

:::.. Download Stats ..:::

Connection is:: 8149 Kbps about 8.15 Mbps (tested with 5983 kB)

Download Speed is:: 995 kB/s

Tested From:: https://testmy.net  (Server 1)

Test Time:: 2006/05/05 - 1:33am

Bottom Line:: 142X faster than 56K 1MB Download in 1.03 sec

Tested from a 5983 kB file and took 6.015 seconds to complete

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)

Diagnosis: Awesome! 20% + : 63.21 % faster than the average for host (Comcast.net)

Validation Link:: https://testmy.net/stats/id-LVFU7IBRT

:::.. Upload Stats ..:::

Connection is:: 700 Kbps about 0.7 Mbps (tested with 1013 kB)

Upload Speed is:: 85 kB/s

Tested From:: https://testmy.net  (Server 2)

Test Time:: 2006/05/05 - 3:34am

Bottom Line:: 12X faster than 56K 1MB Upload in 12.05 sec

Tested from a 1013 kB file and took 11.8656 seconds to complete

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)

Diagnosis: Awesome! 20% + : 88.17 % faster than the average for host (Comcast.net)

Validation Link:: https://testmy.net/stats/id-5SGNHVOI4

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Guest echo

you should be able to pull a bit more out of that. my friend just upgraded to the 8mbps package (gamer package as you called it) and after tweaking it he pulled off a 10.1mbps...and yes, all the cache was cleared. It did it twice. Iono, we are gonna do it again today to see if maybe it was just a mistake.

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