Slow speeds with Asus RT-N16 and Comcast cable

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dclgmmlg
DD-WRT Novice


Joined: 16 Aug 2017
Posts: 3

PostPosted: Wed Aug 16, 2017 22:59    Post subject: Slow speeds with Asus RT-N16 and Comcast cable Reply with quote
I have Comcast cable Internet with an advertised speed of 100Mbit/s downloads. When I connect my PC directly to the cable modem, I get 130.14Mbit/s download speeds.

I have two routers running DD-WRT firmware: an older Cisco E1200 (v24-21061), and a brand new Asus RT-N16 (v24-14896).

With the Cisco router between my PC and the modem, my download speeds drop to 46.67 Mbit/s.

I ordered the Asus router hoping that it would solve the problem, but my download speed is only 63.78Mbit/s while using it.

Are there some DD-WRT configurations I can change to improve the throughput?

Thanks
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jwh7
DD-WRT Guru


Joined: 25 Oct 2013
Posts: 2670
Location: Indy

PostPosted: Thu Aug 17, 2017 1:02    Post subject: Re: Slow speeds with Asus RT-N16 and Comcast cable Reply with quote
dclgmmlg wrote:
Are there some DD-WRT configurations I can change to improve the throughput?
First, read the Peacock announcement. 14896 is a bad build; the Router Database does not give recommended builds.

See NAT/CTF in my signature. However, the good news is that build 33006 now has accelerated NAT, so you can try that; read the New Build thread. Smile Just don't use it with micro build routers.

_________________
# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250
|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
dclgmmlg
DD-WRT Novice


Joined: 16 Aug 2017
Posts: 3

PostPosted: Thu Aug 17, 2017 1:34    Post subject: Reply with quote
Thanks for the information.

I tested the following commands from the NAT/CTF thread, bringing my download speed to 81.27Mbit/s:

Code:
nvram set et_dispatch_mode=1
nvram commit
reboot


I'll take a look at upgrading to build 33006 as well.

Edit: I looked at the 33006 downloads, but I don't see a subdirectory for the Asus RT-N16. Do you know if any of the builds might work?
jwh7
DD-WRT Guru


Joined: 25 Oct 2013
Posts: 2670
Location: Indy

PostPosted: Thu Aug 17, 2017 2:16    Post subject: Reply with quote
dclgmmlg wrote:
I tested the following commands from the NAT/CTF thread, bringing my download speed to 81.27Mbit/s:
Code:
nvram set et_dispatch_mode=1
nvram commit
reboot
I'll take a look at upgrading to build 33006 as well.
Edit: I looked at the 33006 downloads, but I don't see a subdirectory for the Asus RT-N16. Do you know if any of the builds might work?
You won't need that option w/ 33006. The builds for RT-N16 are in here. Looking at the outdated wiki, use the {mini,mega,big}.bin file, depending on desired features...see Types in my signature, in the k2.6 table. You don't need trailed builds (w/ the name in the file) when you're already running DD; this is in the Peacock, though not as clear as it should be. The nv60k and nv64k files are for different router types.
_________________
# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250
|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
dclgmmlg
DD-WRT Novice


Joined: 16 Aug 2017
Posts: 3

PostPosted: Thu Aug 17, 2017 2:34    Post subject: Reply with quote
I just clocked in at 130.18 Mbit/s on the new build (v3.0-r33006). Everything is running perfectly now.

Thanks for the help!
jwh7
DD-WRT Guru


Joined: 25 Oct 2013
Posts: 2670
Location: Indy

PostPosted: Thu Aug 17, 2017 14:10    Post subject: Reply with quote
dclgmmlg wrote:
I just clocked in at 130.18 Mbit/s on the new build (v3.0-r33006). Everything is running perfectly now.
See that was easy. Razz

Out of curiousity, did you reset after flashing 33006? And did you disable et_dispatch_mode? I had forgotten about that parameter; I'm curious about its use with SFE. Maybe Kong will chime in... /nudge

_________________
# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250
|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
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