OS and Software > Broadband Tweaks > [DSL] Can I get a better speed? 11 Questions

[DSL] Can I get a better speed? 11 Questions

Set the MTU in the router to 1492.

Download DrTcp

Set Tcp Receive Window to 63888

Set Windows Scaling, Time Stamping, Selective Acks, Path MTU Discovery, Black Hole Detection to Default.

Leave Max Duplicate Acks and TTL Blank

Using the drop-down menu in The Doctor set your NIC’s (Ethernet adapter’s) MTU to 1492. Tab to Apply and click it.

Save/Exit DrTcp

Reboot

Rerun the Tweak Test

Run Two Speed Tests from the two cities nearest to you that are listed here: Speakeasy POPs

Run this Speed Test »miranda.ctd.anl.gov:7123/
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"A man who was fond of wine was offered some grapes at dessert after dinner. "Much obliged," he said, pushing the plate aside; "I am not accustomed to take my wine in pills."Jean Anthelme Brillat-Savarin, The Physiology of Taste

Did what you suggested, except changing the MTU in the router as it is NOT possible. 3COM says: "The MTU size can not be changed on the Gateway, it conforms to the IEEE Standard."

This is the result of the new Tweak Test:
»ttester.broadbandreports.com/twe···a=normal

Two new Speed Tests:
2004-06-24 17:38:27 Speed test @ atl.speakeasy.net 2001/314 kbps
2004-06-24 17:37:47 Speed test @ atl.speakeasy.net 1938/314 kbps

Other Speed Test Result:

TCP/Web100 Network Diagnostic Tool v5.2.1e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 320.35Kb/s
running 10s inbound test (server to client) . . . . . . 550.03kb/s
Your PC is connected to a Cable/DSL modem
Information: Other network traffic is congesting the link

The retansmissons got better and a little bit more speed, but still a ways to go.
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Let's try Setting the Tcp Receive Window to 52440.

Save, exit, reboot, retest, repost.

reply to johnpeet
Back the RWIN down to 60720 and rerun tweak test. Keep backing off by 1380 until the transfer efficiency is 100%.

reply to Irish Shark
Did it...These are the new results...What should I be looking for. Do you think this is an issue with my wireless LAN or with my connection?

»ttester.broadbandreports.com/twe···a=normal

2004-06-24 18:01:28 Speed test @ atl.speakeasy.net 1651/314 kbps
2004-06-24 18:00:38 Speed test @ atl.speakeasy.net 1829/314 kbps

Thanks.

The retansmissons got a little worse and a little bit of speed drop.
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Let's try Setting the Tcp Receive Window to 60720.

Save, exit, reboot, retest, repost.

2004-06-24 18:19:35 Speed test @ atl.speakeasy.net 1863/314 kbps
2004-06-24 18:19:01 Speed test @ atl.speakeasy.net 2143/314 kbps

»ttester.broadbandreports.com/twe···a=normal

Are you testing wireless? If so, can you connect wired and lets take the wireless out of the picture.

Once you get it wired, backtrack to my first post and try the tweaks from the top.

reply to Irish Shark
Yes, I was....these are the new results taking the wireless LAN out:
»ttester.broadbandreports.com/twe···a=normal

2004-06-24 18:41:10 Speed test @ atl.speakeasy.net 519/318 kbps
2004-06-24 18:40:24 Speed test @ atl.speakeasy.net 568/318 kbps
2004-06-24 18:34:12 Speed test @ atl.speakeasy.net 852/318 kbps
2004-06-24 18:32:27 Speed test @ atl.speakeasy.net 407/318 kbps
2004-06-24 18:31:08 Speed test @ atl.speakeasy.net 386/318 kbps

John, there is something going on with your connection. It got worse with the wireless out of the loop.

Make sure that you have a filter on all the phone lines (alarm?). Check the filters. Maybe one (or more) might be going bad.

Check all your cables. Try replacing the CAT5 from the MODEM to the router.
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Try a direct connect to the MODEM (pull the router).

Don't know what happened...These are updated results.

2004-06-24 18:56:24 Speed test @ atl.speakeasy.net 2444/317 kbps
2004-06-24 18:55:45 Speed test @ atl.speakeasy.net 2444/315 kbps

»ttester.broadbandreports.com/twe···a=normal

Now that is a heck of a lot better.
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One think I do notice is that the MTU has gone up.

Now this is without the router? Or a hard wire to the router?

This is without the router...straight from the modem to laptop

So far it looks like it is a possible MTU problem. The route is feeding 1420 MTU and when connected to the MODEM it is 1480.
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Now you said that there is noway to change the MTU. Is there a setting for PPPoE or anything like that?
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What kind of signal strength/quality do you get with the wireless?
--
"A man who was fond of wine was offered some grapes at dessert after dinner. "Much obliged," he said, pushing the plate aside; "I am not accustomed to take my wine in pills."Jean Anthelme Brillat-Savarin, The Physiology of Taste

reply to johnpeet

said by johnpeet:

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Yes, I was....these are the new results taking the wireless LAN out:
»ttester.broadbandreports.com/twe···a=normal

2004-06-24 18:41:10 Speed test @ atl.speakeasy.net 519/318 kbps
2004-06-24 18:40:24 Speed test @ atl.speakeasy.net 568/318 kbps
2004-06-24 18:34:12 Speed test @ atl.speakeasy.net 852/318 kbps
2004-06-24 18:32:27 Speed test @ atl.speakeasy.net 407/318 kbps
2004-06-24 18:31:08 Speed test @ atl.speakeasy.net 386/318 kbps

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reply to Irish Shark
I can't find where to change the MTU on the router....I chacked with online support, and it said what I stated above.

This is what I see under "Internet Settings" for my router:

PPPoE Setup
Some ISPs require the use of PPPoE to connect to their services:
PPP over Ethernet Enable Disable
PPPoE User Name
PPPoE Password
Confirm Password
PPPoE Service Name (optional)
Maximum Idle Time 15 minutes30 minutes60 minutes90 minutes120 minutesforever

Connection Parameters
IP Allocation Mode Dynamic IP address (automatically allocated)
Primary DNS Address (optional)
Secondary DNS Address (optional)
Host Name (optional)

There is an Advanced tab, but only has the follwing:

Clone MAC Address
Current Internet MAC Address: 00-0B-AC-E4-ED-AB

In terms of my signal strength, it varies from "very good" to "excellent"

Copyright (c) 2001 3Com Corporation. All Rights Reserved.

John, what is "PPP over Ethernet Enable Disable" set to?
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If you can't change it, then your speed might be what it is at the reduced speed and there is nothing that you can do.

If you want the full speed, you might need a new wireless router.
--
"A man who was fond of wine was offered some grapes at dessert after dinner. "Much obliged," he said, pushing the plate aside; "I am not accustomed to take my wine in pills."Jean Anthelme Brillat-Savarin, The Physiology of Taste

It is set to Enable