Netgear router DGND3700v2 very slow?

PengTiong

Reputable
Apr 5, 2014
2
0
4,510
I just bought a Netgear router a month+ ago. Worked fine the first few days (got 7mbps+ download speeds), but now it is really slow.

Have contacted both my ISP (TPG) and Netgear. They haven't been very helpful.

The speed I have now is 0.5 to 3 Mbps (on ethernet). No filter is attached. When I switch the router to "Modem only" or "Bridge" mode however, speeds increase to around 17mbps.

I believe all settings are correct (ADSL2+, LLC, 8/35, PPPoE with MTU 1429.)

I have tried playing with NAT (Secured/Open doesn't make difference. Disabling it kills my internet connection).

Tried playing with disabling port scan/Dos protection, disabling SIP ALG, and even turning RIP to "Out only" and RIP1. <<RIP increased speeds to 17mbps. But after 5 minutes, that dropped back to 0.5mbps. Tried playing with MTU size. Speeds fluctuate randomly, no MTU size produces consistent 17mbps.

Running on latest firmware (v.1.00.15). Re-flashed it twice. First time, speeds increased. For a day. Then it went back to 0.5-3mbps. Second time didn't work.

Statistics look pretty good though.. Link rate at 20,000+ Downstream, 1020Kbps upstream. Line attenuation 11.0dB/6.0dB. Noise Margin 9.1dB/12.7dB. (This is australia.. 20mbps is the best we can get lol) Why am I not seeing those speeds on speedtests and gaming? What can I do to find out what is wrong?

Sorry I'm trying to learn about routers, but I really don't know alot about how they work. Any feedback would be appreciated! Thanks so much!
 

barretba

Reputable
Sep 9, 2014
1
0
4,510
This is a very real problem with the equipment. I am on day 3 of troubleshooting. At first, I thought it was a Time Warner cable issue, as we had great speeds from Day 1. Tech came out, replaced our C3700 with one of their modems and we were easily getting over 50MBPS download and 5MBPS on upload. When we reset the C3700, dropped to less than 10 (sometimes less than 1) for download and next to nothing on upload. I am still on the phone with Netgear now being elevated to their "level 2" team. We've changed wireless channels (useless trouble shooting), checked firmware. I've done a hard reset on my own with no change. They are going to get 15 more minutes of my life and then I'm returning the product and the extender we purchased and going with the cable company's equipment until I can find another solution.

Very frustrating as this is at our rental vacation home and I've spent so much of my vacation time on this and I don't want our guests to experience the same frustrations. Will update when I get to a resolution.