High TX Transmit errors Linksys WRT54GL

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DSMunky
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Joined: 23 Feb 2008
Posts: 3

PostPosted: Tue Sep 07, 2010 12:47    Post subject: High TX Transmit errors Linksys WRT54GL Reply with quote
I am getting really excessive transmit errors 35% OK.

I have followed "The Peacock" Thread and installed builds 13525 and 12548 but still getting the same errors. Currently on 12548

Procedure followed:
30-30-30 Reset
Flash Firmware
Wait
Reboot
30-30-30 Reset
Configure

Configuration is:

Wireless Mode: AP
Network Mode: Mixed
Channel 1
ACK Timing 0

Wireless Security
WPA2 Enterprise
Algorithm AES
Server: Windows 2008
Radius port 1812 (Default and checked on server)
Shared Secret (Checked)
Renewal 3600

Advanced Settings
TX Power 28

Snapshot of error rate after 10 mins uptime:
Received (RX)
100% 1689 OK, no error
Transmitted (TX)
46% 10429 OK, 12194 errors

Thanks in advance
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buddee
DD-WRT Guru


Joined: 06 Feb 2010
Posts: 7401
Location: Little Rock

PostPosted: Tue Sep 07, 2010 22:36    Post subject: Reply with quote
Not sure exactly is the question here, but errors are somewhat normal, caused by much interference around you.

http://www.dd-wrt.com/wiki/index.php/Wireless_Packet_Info_-_RX/TX_Errors

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DSMunky
DD-WRT Novice


Joined: 23 Feb 2008
Posts: 3

PostPosted: Wed Sep 08, 2010 7:28    Post subject: Reply with quote
I have read that thread thank you.

I can understand that you would get rx errors from interference but not tx. The router is sat in the middle of an open plan office, no microwaves, no TV's, no cordless phones etc. nothing I can really think of to cause any interference. after 10 hours of uptime I have 71% success on TX, 100% on RX

Received (RX) 100% 134978 OK, no error
Transmitted (TX) 71% 1077467 OK, 442931 errors

Basically the question is, is it normal to have an error count so high if not does anyone know a beter firmware version that could help?

Thanks
DoesItMatter
DD-WRT Guru


Joined: 10 May 2008
Posts: 1380
Location: Pacific North West, USA

PostPosted: Wed Sep 08, 2010 7:47    Post subject: Reply with quote
Stick with 13525 for the WRT54G's - one of the better builds for them.

As far as error testing - try the following:

Do a Wiviz survey or Site survey and see what channels are being used around you.

Maybe if you switched to another channel thats not being used, you would have better TX rates.

Also, does anyone in the office use Wireless headsets?

Bluetooth is another common interference as well.

Wireless headsets and Bluetooth both operate in the 2.4ghz range and can cause interference.

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blaughtmon
DD-WRT User


Joined: 29 Mar 2010
Posts: 117

PostPosted: Wed Sep 08, 2010 23:59    Post subject: Reply with quote
DSMunky

Another thing you could try is setting the beacon interval to a more frequent setting. By default it is at 100. I have changed mine to 95 and it seems to have decreased the Tx errors significantly.

Just another thought
DSMunky
DD-WRT Novice


Joined: 23 Feb 2008
Posts: 3

PostPosted: Thu Sep 09, 2010 8:28    Post subject: Reply with quote
Quote:
Do a Wiviz survey or Site survey and see what channels are being used around you.


Done. No other networks in the area, we really are quite isolated!!

Quote:
Maybe if you switched to another channel thats not being used, you would have better TX rates.


Tried 1, 6, 8, 11 all the same

Quote:
Also, does anyone in the office use Wireless headsets?


No headsets

Quote:
Bluetooth is another common interference as well.
Wireless headsets and Bluetooth both operate in the 2.4ghz range and can cause interference


I suppose there will be some bluetooth but nothing major, there are only 20 people in a 2500 sq/ft office.

Quote:
Another thing you could try is setting the beacon interval to a more frequent setting. By default it is at 100. I have changed mine to 95 and it seems to have decreased the Tx errors significantly.


Trying this at the moment, but doesn't seem to be having much of an effect

Even with the errors wireless seems to be functioning OK. I am just trying to find what could be causing the errors.

Thanks again
Peabody
DD-WRT Guru


Joined: 28 Dec 2009
Posts: 1518

PostPosted: Thu Sep 09, 2010 13:29    Post subject: Reply with quote
Those type of errors are almost always a signal problem. However try using different/no enryption to test, and make sure there are not conflicts with dhcp service. Seems to me there was something similar in the past with someone using a windows server.
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davel
DD-WRT User


Joined: 04 Mar 2008
Posts: 160
Location: Charlotte, NC

PostPosted: Thu Sep 09, 2010 22:46    Post subject: Reply with quote
Sure wish the developers could add a way to reset the error without a total reboot.
davel
DD-WRT User


Joined: 04 Mar 2008
Posts: 160
Location: Charlotte, NC

PostPosted: Thu Sep 09, 2010 22:53    Post subject: Reply with quote
blaughtmon wrote:
DSMunky

Another thing you could try is setting the beacon interval to a more frequent setting. By default it is at 100. I have changed mine to 95 and it seems to have decreased the Tx errors significantly.

Just another thought



Anyone know of a way to check the accuracy of the timing of a unit. I'm sure 100 ms is +/- some percentage which would account for having to tweak this value.
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