Internet Problem with WNR3500L - ddwrt cuts of 50% bandwidth

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michael12345
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Joined: 13 Jan 2011
Posts: 32

PostPosted: Mon Mar 07, 2011 19:35    Post subject: Internet Problem with WNR3500L - ddwrt cuts of 50% bandwidth Reply with quote
hello together,

connected to the internet through dd-wrt, i got the following speed:



directly connected to the same internet (which means connecting the wan cable directly to my pc), my speed is like this:



upload is quite ok, but where is the other half of my downstream bandwidth?

qos settings are enabled and set to 120000 down and 5700 up..

many thanks for help Smile

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Last edited by michael12345 on Tue Mar 08, 2011 18:57; edited 1 time in total
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Masterman
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Joined: 24 Aug 2009
Posts: 2065
Location: South Florida

PostPosted: Mon Mar 07, 2011 20:37    Post subject: Reply with quote
That's because DD-WRT is not running the correct switch drivers for Gigabit K26 routers. Max MTU is only 1500 which routes at ~ 100Mb/s.

Essentially, even though you have a gigabit router, It's DD-WRT that has the broken NET_IF therefore producing those results.

You should try TomatoUSB, they support Jumboframes and CTF (specifically Victek and Toastman builds):



Tomato.png
 Description:
 Filesize:  15.75 KB
 Viewed:  7079 Time(s)

Tomato.png



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michael12345
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Joined: 13 Jan 2011
Posts: 32

PostPosted: Tue Mar 08, 2011 6:33    Post subject: Reply with quote
thank you very much for your reply..

so if dd-wrt is only using old drivers, can it be upgraded to a newer version which supports a higher bandwidth?

as a workaround I disabled qos and got a download stream ~60kbps but it is not really a solution.

maybe an update to the newer version of dd-wrt?

edit: http://www.dd-wrt.com/dd-wrtv2/bugtracker/view.php?id=4069

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michael12345
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Joined: 13 Jan 2011
Posts: 32

PostPosted: Tue Mar 08, 2011 18:56    Post subject: Reply with quote
is there any way or plan to upgrade these drivers to get my router working ?
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maurer
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Joined: 22 Jun 2009
Posts: 91
Location: Buchrest, Romania

PostPosted: Wed Mar 09, 2011 10:34    Post subject: Reply with quote
the fastest way now is to load tomatousb fw directly from dd-wrt that waiting for new drivers implementation.
michael12345
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Joined: 13 Jan 2011
Posts: 32

PostPosted: Wed Mar 09, 2011 11:12    Post subject: Reply with quote
thank you again :)

it seems that there is also a dd-wrt workaround:

regarding to kongs mod, he found a solution:

http://www.myopenrouter.com/article/23842/DD-WRT-Kong-Mod-Info/

and a very good network speed benchmark for serveral firmwars:

http://www.myopenrouter.com/forum/thread/21393/WNR3500L-WAN-to-LAN-throughput-using-different-firmwares/

(in the comments on page 1)

Code:
DD-WRT v24-sp2 build 14311 (SPI Disabled)

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 103409114 bps (103.41 Mbit/s)
Send    = Throughput: 125354791 bps (125.35 Mbit/s)

Full Duplex
Receive = Throughput: 73741418 bps (73.74 Mbit/s)
Send    = Throughput: 51659250 bps (51.66 Mbit/s)


DD-WRT v24-sp2 build 14311 (SPI Enabled)

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 81991541 bps (81.99 Mbit/s)
Send    = Throughput: 124700980 bps (124.70 Mbit/s)

Full Duplex
Receive = Throughput: 69220199 bps (69.22 Mbit/s)
Send    = Throughput: 51817808 bps (51.82 Mbit/s)


Tomato USB v1.27 build 9047

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes
   
Half Duplex
Receive = Throughput: 250627822 bps (250.63 Mbit/s)
Send    = Throughput: 274621170 bps (274.62 Mbit/s)

Full Duplex
Receive = Throughput: 242672209 bps (242.67 Mbit/s)
Send    = Throughput: 130494608 bps (130.49 Mbit/s)
   

Tomato USB v1.28 build 9048

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 102954643 bps (102.95 Mbit/s)
Send    = Throughput: 123144660 bps (123.14 Mbit/s)

Full Duplex
Receive = Throughput: 102915519 bps (102.92 Mbit/s)
Send    = Throughput: 54901252 bps (54.90 Mbit/s)


Netgear V1.0.2.50_31.1.25

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 262655738 bps (262.66 Mbit/s)
Send    = Throughput: 276394652 bps (276.39 Mbit/s)

Full Duplex
Receive = Throughput: 256632671 bps (256.63 Mbit/s)
Send    = Throughput: 133234828 bps (133.23 Mbit/s)


OpenWRT Kamikaze 8.09.2 build 4838

TCP Speed test, host=192.168.0.30, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 66640632 bps (66.64 Mbit/s)
Send    = Throughput: 160550559 bps (160.55 Mbit/s)

Full Duplex
Send    = Throughput: 104659041 bps (104.66 Mbit/s)
Receive = Throughput: 57134564 bps (57.13 Mbit/s)


Reference test Local LAN (without WNR)

TCP Speed test, host=bilbo, transfer size=50000000 bytes

Half Duplex
Receive = Throughput: 903477031 bps (903.48 Mbit/s)
Send    = Throughput: 935631082 bps (935.63 Mbit/s)

Full Duplex
Send    = Throughput: 595713953 bps (595.71 Mbit/s)
Receive = Throughput: 750707072 bps (750.71 Mbit/s)

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michael12345
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Joined: 13 Jan 2011
Posts: 32

PostPosted: Thu Mar 10, 2011 15:02    Post subject: Reply with quote
workaround with kongs dd-wrt mod:


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speedy71471
DD-WRT User


Joined: 13 Aug 2008
Posts: 248

PostPosted: Thu Mar 10, 2011 22:17    Post subject: Reply with quote
michael12345 wrote:
workaround with kongs dd-wrt mod:



Damn y'all get great internet speeds in general. Since here TWC's max offering is 30Mb/sec, the older dd-wrt drivers have little effect for me! Smile

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