Linksys E3000 - best DD-WRT firmware

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UrbanVoyeur
DD-WRT User


Joined: 19 Jun 2010
Posts: 118
Location: Brooklyn, NY

PostPosted: Tue Feb 21, 2012 5:21    Post subject: Reply with quote
Other than the recommend build in the wiki, I've had good success with 16994 - 54 days this time, and about 60 and 90 days before that.

The only reboots were to clean up wiring and change power strips. Solid wireless performance. No issues with torrents, and over a dozen wireless devices.

_________________
Linksys E900 dd-wrt v24-sp2 18946 mini
Linksys E3000 dd-wrt v24-sp2 15692 std-usb-nas
D-Link DIR-601 Gargoyle 1.5.3 ar71xx dir 600 a1 squashfs
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OVerLoRDI
DD-WRT Novice


Joined: 28 Oct 2006
Posts: 7

PostPosted: Tue Feb 21, 2012 7:22    Post subject: Reply with quote
My network has an E3000 (14929) with both radios disabled acting as the main router. For wireless I have 3 wrt54gs throughout the network and a 24 port 100mb switch for wired. Network sees about 60 unique clients a day.

During high WAN usage, the E3000's web gui becomes unresponsive, pings jump around (more than they should), and but doesn't seem to fully crash. I'm going to roll out 15962 tomorrow and report back.

In all honesty, I thought the E3000 was going to be a great router based on its specs, (RAM, CPU, features, etc). However it has turned out to be an overheating piece of junk with terrible wireless range. I'm hoping that on this newer build it runs stably as a router, as my old WRT54GS routers cannot handle the routing load of 60 clients.
slobodan
DD-WRT Guru


Joined: 03 Nov 2011
Posts: 1557
Location: Zwolle

PostPosted: Tue Feb 21, 2012 15:26    Post subject: Reply with quote
OVerLoRDI wrote:
In all honesty, I thought the E3000 was going to be a great router based on its specs, (RAM, CPU, features, etc). However it has turned out to be an overheating piece of junk with terrible wireless range.

Well, I have two of them (both used to be WRT160N v2) and I have a neighbor accross a small street, three-four houses to the left and he still gets a wireless connection from one of my routers. The speed he gets from it isn't great, but well, it is available for free, his other option was using a 3G dongle which needs payment.

Till now, I have not had problems with overheating, but I did notice that the below side of my router gets hot. If this matters, both run at 480 MHz.

_________________
2 times APU2 Opnsense 21.1 with Sensei

2 times RT-AC56U running DD-WRT 45493 (one as Gateway, the other as AP, both bridged with LAN cable)

3 times Asus RT-N16 shelved

E4200 V1 running freshtomato 2020.8 (bridged with LAN cable)

3 times Linksys WRT610N V2 converted to E3000 and 1 original E3000 running freshtomato 2020.8 (bridged with LAN cable)


brock.travis
DD-WRT User


Joined: 22 May 2011
Posts: 51

PostPosted: Tue Feb 21, 2012 16:35    Post subject: Reply with quote
Went back to 15962. Seems to be the best all around.
Lower your transmission power on all radios to 50 to reduce the heat. I myself have never had an issue with overheating.
UrbanVoyeur
DD-WRT User


Joined: 19 Jun 2010
Posts: 118
Location: Brooklyn, NY

PostPosted: Tue Feb 21, 2012 19:49    Post subject: Reply with quote
OVerLoRDI wrote:
However it has turned out to be an overheating piece of junk

Try getting taller rubber feet from any hardware or electronics store. Had mine for years sitting right over 2 550 watt pc power supplies. No overheat problems at all.

_________________
Linksys E900 dd-wrt v24-sp2 18946 mini
Linksys E3000 dd-wrt v24-sp2 15692 std-usb-nas
D-Link DIR-601 Gargoyle 1.5.3 ar71xx dir 600 a1 squashfs
spearchucker
DD-WRT Novice


Joined: 23 Feb 2010
Posts: 22

PostPosted: Wed Feb 22, 2012 1:03    Post subject: Reply with quote
I'm using 18024Big and it seems to work great. USB HD, another wired AP, 2 PS3s, WII, 2 TVs, 3 iPod touches, iPhone, laptop, and 2 desktops.
pjg61
DD-WRT Novice


Joined: 27 Sep 2010
Posts: 37

PostPosted: Wed Feb 22, 2012 20:54    Post subject: Reply with quote
spearchucker wrote:
I'm using 18024Big and it seems to work great. USB HD, another wired AP, 2 PS3s, WII, 2 TVs, 3 iPod touches, iPhone, laptop, and 2 desktops.


Yes, but are you using the 5 GHz radios ??? Probably not. This is why 15962 is one of the best builds for the E3000...
spearchucker
DD-WRT Novice


Joined: 23 Feb 2010
Posts: 22

PostPosted: Wed Feb 22, 2012 21:01    Post subject: Reply with quote
pjg61 wrote:
spearchucker wrote:
I'm using 18024Big and it seems to work great. USB HD, another wired AP, 2 PS3s, WII, 2 TVs, 3 iPod touches, iPhone, laptop, and 2 desktops.


Yes, but are you using the 5 GHz radios ??? Probably not. This is why 15962 is one of the best builds for the E3000...

Yes. Using both 2.4GHz and 5GHz. What problems are you having with the 5GHz?
pjg61
DD-WRT Novice


Joined: 27 Sep 2010
Posts: 37

PostPosted: Wed Feb 22, 2012 21:07    Post subject: Reply with quote
There are well known instabilities with the 5 GHz radios in later builds. In my case, I have 3 E3000s, 2 in Repeater mode connecting back to a core router and the connections back to the core router kept dropping. I switched back to 15962 and all is stable.

There are plenty of people who have had similar issues.
brock.travis
DD-WRT User


Joined: 22 May 2011
Posts: 51

PostPosted: Wed Feb 22, 2012 21:20    Post subject: Reply with quote
FYI - Fixed my SPI firewall issue. Noted the problem in a new post.

http://www.dd-wrt.com/phpBB2/viewtopic.php?t=151474
OVerLoRDI
DD-WRT Novice


Joined: 28 Oct 2006
Posts: 7

PostPosted: Fri Feb 24, 2012 9:12    Post subject: Reply with quote
My complaints about heat being the problem may have been too unjustified and a result of frustration.

My E3000 is running 15962 and has been working fantastically these last few days.
linedpaper
DD-WRT Novice


Joined: 03 Apr 2009
Posts: 2

PostPosted: Fri Feb 24, 2012 19:35    Post subject: Reply with quote
I'm currently trying to flash from the std-usb-nas build to the 15962 big build, every time I flash it stays on the newer 16785 std-usb-nas build and doesn't change. I've tried a 30/30/30, what am I missing here?


Thanks,
Tim
pjg61
DD-WRT Novice


Joined: 27 Sep 2010
Posts: 37

PostPosted: Fri Feb 24, 2012 21:09    Post subject: Reply with quote
linedpaper wrote:
I'm currently trying to flash from the std-usb-nas build to the 15962 big build, every time I flash it stays on the newer 16785 std-usb-nas build and doesn't change. I've tried a 30/30/30, what am I missing here?


1) Do a 30/30/30.
2) Flash with the Trailed build (ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2010/12-24-10-r15962/broadcom_K26/dd-wrt.v24-15962_NEWD-2_K2.6_std_usb_nas-e3000.bin) Wait a full 5 minutes before doing anything
3) Do another 30/30/30
4) Then flash with the Big build (ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2010/12-24-10-r15962/broadcom_K26/dd-wrt.v24-15962_NEWD-2_K2.6_big-e2k-e3k.bin) Wait another full 5 minutes before doing anything
5) Do a another 30/30/30
krog17
DD-WRT Novice


Joined: 26 Feb 2012
Posts: 1

PostPosted: Sun Feb 26, 2012 16:11    Post subject: USB with 15962 Reply with quote
I'm running build 15962 ( (ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2010/12-24-10-r15962/broadcom_K26/dd-wrt.v24-15962_NEWD-2_K2.6_big-e2k-e3k.bin) ).

Has anyone had success using a USB hard drive on this build? Mine happens to be NTFS formatted.

When I enable Automatic Drive Mount the Disk Info section still displays "Not Available".

Any suggestions?
jussit
DD-WRT Novice


Joined: 29 Jul 2008
Posts: 22
Location: Kuopio, Finland

PostPosted: Fri Mar 02, 2012 16:11    Post subject: Reply with quote
I'm testing 200 Mbit/s cable modem internet connection. WRT320N running DD-WRT svn14929 seems not to be able to handle that speed.

I got E3000 and tested it with Linksys firmware. Performance was good and I was able to get 160-180 Mbit/s from local speedtest services.

Then flashed DD-WRT r15962 (I think) into E3000 and the speed dropped to something 50-60 Mbit/s level. Flashed DD-WRT Kong edition r18050 and then r17940, and did not notice much difference to r15962.

It clearly looks like the CPU is not throttling WAN speed. It must be something else, because Linksys stock firmware hits the roof.

So I started playing with /proc. In DD-WRT Kong r17940 I can see the default values of folowing TCP/IP related kernel parameters being set as

Code:

# cat /proc/sys/net/core/rmem_default
114688
# cat /proc/sys/net/core/rmem_max
114688
# cat /proc/sys/net/core/wmem_default
114688
# cat /proc/sys/net/core/wmem_max
114688
# cat /proc/sys/net/ipv4/tcp_mem
360     480     720
# cat /proc/sys/net/ipv4/tcp_wmem
4096    16384   65536
# cat /proc/sys/net/ipv4/tcp_rmem
4096    87380   87380


After reading article http://fasterdata.es.net/fasterdata/host-tuning/linux/ I started increasing RMEM and WMEM valueslike:

Code:

# echo 262144 > /proc/sys/net/core/rmem_max
# echo 262144 > /proc/sys/net/core/wmem_max
# echo "4096 16384 262144" > /proc/sys/net/ipv4/tcp_wmem
# echo "4096 87380 262144" > /proc/sys/net/ipv4/tcp_rmem


Speedtested and did not see any huge changes.

Increased netdev_max_backlog and the I got great results:

Code:

# cat /proc/sys/net/core/netdev_max_backlog
30
# echo 1000 > /proc/sys/net/core/netdev_max_backlog


Then tuned ny old work horse WRT320N running svn14929 similarily and got excellent results. Not as good as with E3000 because of slower CPU in WRT320N, but very good anyway.

I hope this helps you tuning your DD-WRT boxes connected to high-speed WAN connection. And specially helping developers setting better optimimization for the IP stack for future releases.

I wonder how high I can go with those parameters without causing trouble? What is the optimal level for each parameter? How can I make my /proc tuning commands permanent in my DD-WRT boxes?

_________________
--
Using DD-WRT in several E3000, WRT320N, WRT54GL, WHR-HP-GN, WHR-G125, WHR-HP-G54, WHR-G54 and WL-500gPv1 routers
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