Draytek Vigor 2950G issues

[d749]

After wrestling with what router to buy next I finally settled on a Draytek Vigor 2950G due to, in part, to a few comments on this forum. However, things have not been well since hooking it up. I'm hoping someone with a similar unit might be able to help.

Setup:Draytek Vigor 2950G (v3.5.1) on a residential 16/2 Mbit Comcast cable connection. The modem is a Motorola SB5101 which is 100M Full Duplex device. Bandwidth Management, QoS, Firewall, UPnP, etc. on the router are all disabled.

On the 2950G when I set "Physical Type:" under "WAN1" to "Auto negotiation" I'm able to sustain a download speed of ~ 2MB/s. This is good.

However, when I set "Physical Type:" under "WAN1" to "100M full duplex," which is the highest available to the 2950G, my download speed drops significantly. This doesn't make any sense - all "Physical Type:" settings below "Auto negotiation" produce a slower download speed including "100M full duplex." I've tried resetting the router to factory defaults.

So I thought I was going cray. I threw in my old DLink 655. Setting WAN to "Auto negotiation" or "100M full duplex" produced the same speeds as expected. No problems.

Another odd thing I'm noticing with the 2950G is slower peak download rates. On the DLINK I'll hit peaks of 2.5-2.9 MB/s which I imagine is the "Boost" of Comcast Boost kicking in. However, the the Draytek won't budge above 2.0-2.2 MB/s. One source I've been using for testing file transfers that I find has a big pipe is: ftp://ftp1.optonline.com.

Any ideas?

Thanks.

 

[PHyLIX]

I'm running a Draytek Vigor 2950G and have been very happy with it. I've not upgraded to the latest firmware and am running v3.2.4.1.

I'm running two lines (cable 18M Down/1M Up & dsl 1.5M Down/.8M Up) and haven't had any problems although I have mine configured with Physical type set to "auto negotiation" and under Load balance mode I have set both to "According to Line Speed" and have explicitly set the Downlink/Uplink values for both lines (cable/dsl).

I also have the WAN2 to be set to active on demand should WAN1 exceed a certain upload speed.

I have heard that the Draytek's perform better if you do manually set the line speed.

Shouldn't make a difference but did you cycle your cable modem as well when re-configuring?

 

[d749]

http://en.wikipedia.org/wiki/Duplex_mismatch

The reason for my problem thanks to Draytek support.

 

[Dennis Wood]

And if it makes you feel any better, I just figured out a similar issue with a DIR 825. Connections via DSL were being dropped after 60 seconds for no apparent reason.

The fix was setting the router's WAN port speed to 10Mbps to match the DSLR modem it was plugged into.

The 2950 did not have these issues with the same DSL provider..so port speed is still at auto.