Copterdoctor
join:2004-11-23
Cumming, GA
| [Speed Problem] 5.8 seems to be The New ATT SPEED CAP for Old BE
I have had dsl here on Lake Lanier since Bellsouth first offered it and my Netopia 3347NWG provided near flawless 6.2 to 6.6 speeds but now the best I can get remains constant around 5.74 to no higher than 5.8. ATT has capped it clearly as this is at 3 am or 3pm. Where is the logic in a slow down when the object is to go faster? I miss my old Bellsouth! What happened to the faster service options I heard were coming? Has it all been used to provide ATT U Verse TV? Uploads seem capped at 439! |
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NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
Murfreesboro, TN
 ·Vonage
 ·AT&T Southeast
 ·Cingular Wireless
·AT&T CallVantage
2 edits | Re: [Speed Problem] 5.8 seems to be The New ATT SPEED CAP for Ol
said by Copterdoctor  :I miss my old Bellsouth! What happened to the faster service options I heard were coming? Has it all been used to provide ATT U Verse TV? Nah, they are just giving it all to me. 
»speedtest.vonage.com/
I used to get a typical pseudo aggregate downstream speed on my two Xtreme 3.0 circuits of 5600-5700 kbps. Lately I have frequently been getting 6100-6300 kbps downstream.
--
We can never have enough of nature.
We need to witness our own limits transgressed, and some life pasturing freely where we never wander. |
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Airwolf7
Premium
join:2004-12-12
Franklin, KY
·AT&T Southeast
| reply to Copterdoctor
Re: 5.8 seems to be The New ATT SPEED CAP for Old BellSouth
I'm curious as to your sudden loss of downstream throughput speed.
»Has AT&T lowered the DS throughput speed for Xtreme 6.0?
If you don't mind could you please provide the information requested below?
Post a screen capture of the Home Page of your Netopia Wireless Gateway while in Expert mode.
You may want to edit the picture to obscure the serial number of you Netopia. You also may want to edit the picture to obscure your Local Address (IP Address) if you have a static IP address. If you have a dynamic IP address then it doesn't matter as you can restart the gateway to get a new IP address.
The reason why I ask for this information is because I need to see if your Netopia's Data Rate is high enough to achieve 6500kbps and I'm curious to know the Peer Address (Gateway Address).
Post the results of a speed test ran from the Atlanta, GA server at »speakeasy.net/speedtest/
You may want to edit the picture to obscure the IP Address if you have a static IP address. If you have a dynamic IP address then it doesn't matter as you can restart the gateway to get a new IP address.
The reason why I ask for this information is because this speed test at Speakeasy.net is accurate and consistently reliable unlike the Official BellSouth FastAccess Speed Test Website.
Post the results from the TCP Analyzer at »www.speedguide.net/analyzer.php?
The reason why I ask for this information is because I need to see if your computer is properly tweaked for FastAccess DSL Xtreme 6.0 service.
« SpeedGuide.net TCP Analyzer Results »
Tested on: 08.17.2009 09:57
IP address: 98.80.xx.xxx
Client OS: Windows 7
TCP options string: 0204058001010402
MSS: 1408
MTU: 1448
TCP Window: 64768 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 64768
Recommended RWINs: 64768, 129536, 259072, 518144, 1036288
BDP limit (200ms): 2591kbps (324KBytes/s)
BDP limit (500ms): 1036kbps (130KBytes/s)
MTU Discovery: ON
TTL: 110
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
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Do you have Residential or Business FastAccess DSL service?
Thank you in advance for you time. |
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Copterdoctor
join:2004-11-23
Cumming, GA
| « SpeedGuide.net TCP Analyzer Results »
Tested on: 08.17.2009 14:10
IP address: 74.176.xxx.xxx
Client OS: Windows 7 Beta
TCP options string: 020405800103030201010402
MSS: 1408
MTU: 1448
TCP Window: 66176 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16544
Recommended RWINs: 64768, 129536, 259072, 518144, 1036288
BDP limit (200ms): 2647kbps (331KBytes/s)
BDP limit (500ms): 1059kbps (132KBytes/s)
MTU Discovery: ON
TTL: 110
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
Speakeasy Atlanta is always 5600 to 5796 down and 425 to 439 up.
Data Rate (Kbps) Downstream: 8128 Upstream: 512
Peer Address 74.176.222.1 |
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gun
join:2002-07-08
Lake Worth, FL | reply to Copterdoctor
Re: [Speed Problem] 5.8 seems to be The New ATT SPEED CAP for Ol
Same thing has happened here. Been like this for about 2 months now. No higher than 5.8, used to be 6.5 on speakeasy.
When i do dsl installs and check the customers speed on speakeasy most of them are still at 6.3 and up, very strange.... |
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nightshade74
Yet another genxer
Premium
join:2004-11-06
Prattville, AL
 ·Knology
| reply to NetFixer
said by NetFixer :Nah, they are just giving it all to me. I used to get a typical pseudo aggregate downstream speed on my two Xtreme 3.0 circuits of 5600-5700 kbps. Lately I have frequently been getting 6100-6300 kbps downstream. What are you using to bond the connections? I've used
the Syswan Dual wan router. I dont bond them per se
just assign different servers IE netflix, voip.ms to one WAN
interface. |
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NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
Murfreesboro, TN | I sent you an IM. No point in cluttering this thread with an OT subject. |
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Airwolf7
Premium
join:2004-12-12
Franklin, KY
·AT&T Southeast
1 edit | reply to Copterdoctor
Re: 5.8 seems to be The New ATT SPEED CAP for Old BellSouth
Looks like you are in the same boat as us other fellows are that went from 6.5Mbps to 5.8Mbps on the downstream side.
Everything on your end looks good. Doesn't seem to be anything on your end that should keep you from getting full speed.
You might want to disable Receive Window Auto-Tuning. Disabling it won't increase your speed but this feature is not necessary for use with FastAccess DSL due to the fact that FastAccess DSL is a high bandwidth low latency connection as opposed to a high bandwidth high latency connection. Receive Window Auto-Tuning can also cause problems in certain situations so disabling it now will eliminate potential future problems.
Note if you are using a wireless connection then you might want to set the Receive Window Auto-Tuning level to highlyrestricted.
netsh interface tcp set global autotuninglevel=highlyrestricted
How do I run a command with elevated privileges?
Some commands that you can run using Command Prompt might require elevated or administrative privileges. To run these commands, you can use the Run as administrator command:
1. Click the Start button.
2. In the Search box, type command prompt.
3. In the list of results, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
.
C:\Windows\system32>netsh int tcp show global
Querying active state...
.
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : automatic
NetDMA State : enabled
Direct Cache Acess (DCA) : disabled
Receive Window Auto-Tuning Level : normal
Add-On Congestion Control Provider : none
ECN Capability : disabled
RFC 1323 Timestamps : disabled
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C:\Windows\system32>netsh int tcp set global autotuninglevel=disabled
Ok.
.
C:\Windows\system32>netsh int tcp show global
Querying active state...
.
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : automatic
NetDMA State : enabled
Direct Cache Acess (DCA) : disabled
Receive Window Auto-Tuning Level : disabled
Add-On Congestion Control Provider : none
ECN Capability : disabled
RFC 1323 Timestamps : disabled
.
C:\Windows\system32>
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You might be able to gain back some of the speed that was lost if the equipment you connect to at AT&T supports PPPoA. Some of it supports PPPoE only and some of it supports PPPoE and PPPoA. If yours does not support PPPoA then set the Netopia back to PPPoE.
.
Speedtest - PPPoA VC-Mux - MTU 1478 - RWIN 64710 - DS
Speedtest - PPPoA VC-Mux - MTU 1478 - RWIN 64710 - US
WAN
Click on ATM.
ATM Circuits
Leave the VPI/VCI setting alone. Change the Encapsulation to PPP over ATM. Change the Multiplexing to VC muxed. Click the Submit button. Click the yellow triangle at the top right then save settings and restart gateway.
You will need to change the MTU on your computer to 1478. If switching to PPPoA does not work for you change the MTU to 1492.
How do I run a command with elevated privileges?
Some commands that you can run using Command Prompt might require elevated or administrative privileges. To run these commands, you can use the Run as administrator command:
1. Click the Start button.
2. In the Search box, type command prompt.
3. In the list of results, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
.
C:\Windows\system32>netsh interface ipv4 show subinterface
.
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
4294967295 1 0 336150 Loopback Pseudo-Interface 1
1500 1 54574378 5594137 Local Area Connection
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C:\Windows\system32>netsh interface ipv4 set subinterface "Local Area Connection" mtu=1478 store=persistent
Ok.
.
C:\Windows\system32>netsh interface ipv4 show subinterface
.
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
4294967295 1 0 338028 Loopback Pseudo-Interface 1
1478 1 54648693 5605973 Local Area Connection
.
C:\Windows\system32>
What I have showed you will work for Windows Vista and Windows 7. If you have an older version of Windows then use DrTCP to change the MTU to 1478 and the RWIN (TCP Receive Window) to 64710.
»AT&T Southeast Forum FAQ »How do I change the MTU or RWIN using the DrTCP tool?
All information in this reply is provided as-is!
If you have trouble please remember that there is a reset button on the back of your Netopia. |
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