Posted: Sat Mar 05, 2016 5:13 Post subject: Getting about 50% downstream bandwidth through 610N router
Hi DD-WRT forum,
I've been using DD-WRT on my Linksys 610N V1 router for about 5 years now (2 or 3 different builds) and haven't run into problems until now. Currently running:
Comcast has been upgrading speeds in my area so I decided to hook up a new modem (SB6183) to reap the benefits and stop paying the modem rental fee. However, I'm getting drastically different downstream speeds (2x) when connected directly to the modem versus through the WRT610N router.
And a history of the tests I've run on various PCs on my network:
I don't have QoS enabled in NAT/QoS -> Quality of Service:
I can also attach screenshots of the signal levels of the new modem. But I'm not sure if the modem is the culprit since I'm getting great speeds when directly connected to it.
Could somebody point me in a direction for continuing this investigation? I'm going to look into the reason behind the jitter once I resolve the bandwidth issue. For now the bandwidth is problem #1 for me. (Although any advice towards the former is also welcome).
Posted: Sat Mar 05, 2016 16:53 Post subject: Re: Getting about 50% downstream bandwidth through 610N rout
bourdk wrote:
However, I'm getting drastically different downstream speeds (2x) when connected directly to the modem versus through the WRT610N router.
This is expected; the NAT(/CTD) problem.
Your options are OEM f/w, IPv6, et_dispatch_mode, and/or overclock (if your devices is capable). Your best bet is usually OEM f/w, unless you need DD for other features.
Reference on all this: http://www.dd-wrt.com/phpBB2/viewtopic.php?p=996440#996440
Start on the first page for more detail.
Mods; we really need a Sticky for this! _________________ #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
Ok, that makes sense. Prior to moving to the area I was able to achieve ~105mbps downstream speeds pretty consistently with the same router and same dd-wrt fw, without overclocking. What would make it drop an additional ~20-25mbps?
From BrainSlayer's reply: "current cpu's are fast enough anyway to handle any sort of traffic", I gather that with a newer model router I could avoid the limitation of sw NAT. Is the newer version of the 610n -> the E3000 a good choice? Are there any other popular recommendations?
Also, in what way would IPv6 be a solution? Enabling IPv6 on my LAN? Would this reduce the CPU burden on the 610n? In fact, could the NAT be eliminated entirely via this route? I haven't bothered with IPv6 capabilities from Comcast or locally but if this is a solution I'd gladly pursue it.
Since I didn't get an answer wrt IPv6 or any choices other than OEM fw I went ahead and flashed the WRT610N OEM fw from this thread: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=145255 (since Cisco seems to have taken down any fw downloads for the WRT610N v1)
Specifically, the only available version: FW_WRT610N_1.00.03.15_20090514.bin
This made absolutely no difference in the speed I'm getting via speedtests:
I've checked that all cables in question are gigabit capable and that the network is completely idle at the time of the test (I'm the only 1 home at the time of the test).
I haven't enabled or changed any specific settings so is there something I'm missing? I'm at a complete loss as to what could be causing a nearly 50% downstream slowdown in comparison to direct-to-modem connection?? Is the 610N v1 hardware just limited to sub 100mbps speeds? In which case, why was I getting 105-110mbps several months ago?
I have no problem with ordering a new router on Amazon (either the E3000 or maybe the ASUS RT-N66U) but I want to be absolutely sure this is going to solve the problem...
