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post #1 of 16 (permalink) Old 05-23-2005, 05:53 PM Thread Starter
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Comcast Gold Tier Service users.

I Just upgraded from the normal Broadband Speed of
4.0Mbit down/384kb up
to
6.0Mbit down/768kb up

Well, my upload seems to at the advertised speed but my download speeds is now at around 2.2-3.5Mbit depending on which speed test site I use.

I'm using a Motorola SB5120 Modem connected to a Belkin F5D6231-4 router, I'm going to call Comcast tommorow, and see if my download speeds change, but why would my download speed drop so low? But my upload speed hit advertised speeds constantly?

Any other Gold Tier users experience the same problem???

I'm also thinking about buying a new router, to see if that would help, any suggestions?

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post #2 of 16 (permalink) Old 05-23-2005, 07:00 PM
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Use abecx.net to download a file and see what speeds you get, here is a 5mb file:

http://abecx.net/lmao.wmv

I usually recommened my site because I dont cap download speeds and I have plenty of bandwidth.

I get between 500 and 800k when I hit good sites on downloads, uploads are around 70k - 90k


It took them a couple of days to get me the speed change, albiet they said it was same day.

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post #3 of 16 (permalink) Old 05-23-2005, 07:24 PM Thread Starter
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I got about 1022Ks down the first time I downloaded it, and about 800K the second time I downloaded it.
I had to connect the cable modem directly to my computer without the router and it fixed my download speeds, but now my father is screwed since he can't access the internet on his laptop.
I don't want to use this router again, so do you (AbecX) have any suggestions for a new router?

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post #4 of 16 (permalink) Old 05-23-2005, 08:08 PM
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I do not. I use my fileserver to route all my packets. I havent used on of those routers in years.

Those speeds you got sound on par with what you should be getting.

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post #5 of 16 (permalink) Old 05-23-2005, 08:13 PM Thread Starter
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But i only get those speeds at the expense of my father not having internet.
So am I screwed?
ARGH!!

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post #6 of 16 (permalink) Old 05-23-2005, 08:14 PM
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Try downloading the latest firmware for your device.

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post #7 of 16 (permalink) Old 05-23-2005, 08:57 PM
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I got around 800-1000 dl and I only have the basic service. I'm running a linksys wrt54g router and my desktop is only a p3 933 running fedora core 3

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Umm.. what is the ID-10T settings?
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post #8 of 16 (permalink) Old 05-23-2005, 09:27 PM
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I got banned so I wouldn't know

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post #9 of 16 (permalink) Old 05-23-2005, 11:42 PM
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Quote:
Originally Posted by Hunt4m3x
I got banned so I wouldn't know
someone must have been hunting a lot of torrents

2007 Taurus SEL - daily driver
1974 El Camino SS - 400sb

Quote:
Originally Posted by purrrfectstang
Umm.. what is the ID-10T settings?
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post #10 of 16 (permalink) Old 05-24-2005, 09:08 PM
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I have a Linksys WRK54G and the Gold Tier. I usually pull around 750k or right at 6mb and my daughter's both have wireless (1 USB and 1 PCI card) they both pull just under 4mb. There are a few new gaming routers out there (D-Link has a few nice ones) that are really nice. I had some problems with mine at first but after some tweaking my speeds are great. A great DFW test site is the local Speakeasy site DFW Speakeasy. It is pretty accurate. The best way as stated above is a good FTP download. Here is an FTP site created just for testing downloads Optimum Online FTP Test. The caps for the Comcast Gold Tier are at 6600 down so there is a little headroom. Don't forget to check your MTU and RWIN so they are set for you new speeds.
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post #11 of 16 (permalink) Old 05-24-2005, 10:42 PM Thread Starter
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And what exactly are MTU and RWIN?

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post #12 of 16 (permalink) Old 05-25-2005, 03:54 AM
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Quote:
Originally Posted by Roliath
And what exactly are MTU and RWIN?
maximum transmission unit, I forget what rwin is. Basically it tells your router what the maximum size packet is to send out. The higher the MTU setting the better. 1500 I believe is the default, but some connections may like lower or higher speeds. IMHO thats not really going to change anything for you on a cable connection. I'd definatly update the firmware on your device first.

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post #13 of 16 (permalink) Old 05-25-2005, 07:30 AM Thread Starter
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I checked the firmware, and I'm running the latest firmware. I was told by a friend to keep the direct connection with the cable modem, and get a NIC card(PCI) so my dad could have use of the internet.
Anyone care to ellaborate on what exactly are the pros, and cons of doing it this way?
I'm no networking guru so please bear with me.


Last edited by Roliath; 05-25-2005 at 07:35 AM.
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post #14 of 16 (permalink) Old 05-25-2005, 08:22 AM
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Pros, you can limit his upload/download speeds.

Cons, its difficult to setup unless you know what you're doing.

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post #15 of 16 (permalink) Old 05-25-2005, 02:43 PM
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RWIN can have a significant impact on speed whether it be cable or dsl. I originally was getting around 4.5mb after I switched over to the Gold Tier. I did some tweaking of the RWIN and now get around 6.2mb. Go to DSLREPORTS.COM and read the Comcast and Tweaking forums. Use their tweak test and speed test and a program called DR TCP to tweak the settings. There is a formula for figuring RWIN so you can do it manually. (latency) x 1.5 x (advertised speed in kbps) divide by 8. Take that number and divide by 1460(MSS) and you should get a number between 25 to 60. Round up to the next even number and then multiply times 1460(MSS) again. This should give you RWIN. Latency is of course average ping time and advertised speed should be 6600. The 1.5 number in the formula allows for some variances but many of the guys on DSLREPORTS have found that leaving the 1.5 out gives better speeds. My RWIN is set to 52560. I have a friend you just recently upgraded to the gold tier but was only getting 4mb down so I came by and tweaked his settings and now he gets around 5.8 to 5.9 down. Keep in mind that Comcast has been having some load issues in the evenings and speed will drop and latency go up until around 11:00pm so it is best to do the above tweaking before 5:00pm or after 11:00pm.
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post #16 of 16 (permalink) Old 05-25-2005, 02:58 PM
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Here is a link to some good info. Tweaking FAQ
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