I also get around 6MB/s when using the Alix 2c3 as a simple
router. Problem seems to be the combination... 

vr2 -> vlan7 (vlandev vr2) -> pppoe0 (dev vlan7)

I also don't thing the Alix is too slow. As i said...50.000kbit/s
down via pppoe0 works w/o issues.

On Fri, Oct 10, 2014 at 01:10:39PM +0200, Stefan Sperling wrote:
> On Fri, Oct 10, 2014 at 12:23:36PM +0200, Mark Patruck wrote:
> > I'm running 5.6-current on a Alix 2c3. The box is connected
> > via pppoe(4) and VDSL 50Mbit down/10Mbit up - max-mss is set
> > to 1440.
> > 
> > Running a few speed tests, i get almost always > 50.000kbit/s
> > down, but not more than 400-600kbit/s up.
> > 
> > Just for testing purposes, i started httpd(8) and tried to
> > download a 1MB test file over the internet from another machine.
> > 
> > $ ftp http://1.2.3.4/test1MB
> > Trying 1.2.3.4...
> > Requesting http://1.2.3.4/test1MB
> > 
> > After about 8 seconds it shows 128KB, then...few seconds later...
> > --stalled--....few seconds later 256KB....--stalled--....
> > 
> > 65 seconds later, the download has finished.
> > 
> > The same configuration (freshly installed OpenBSD 5.6-current) on
> > another Alix 2c3 shows exactly the same issues...download fine,
> > upload < 600kbit/s.
> > 
> > Just to make sure there is nothing wrong with cabling, VDSL modem,
> > i tried the same configuration on an older Celeron laptop with
> > ale(4) nic...no issues at all. I get around 8.000kbit/s.
> > 
> > Any clues? (vr(4) issues?) 
> 
> I don't think vr(4) is your problem.
> From a net5501 soekris (similar hardware) I can download 6 megabytes
> per second of a file on the soekris' hard disk via a LAN-facing vr(4)
> interface, served over HTTP with nginx (on 5.6-stable).
> 
> You could run measurements with tcpbench(1) to rule out problems
> at the network/driver layer. In my testing an Alix.2d2 lx800 (running
> 5.6-stable too) is slightly faster with tcpbench (Avg Mbps: 92.490)
> than the net5501 (Avg Mbps: 86.949), both using vr(4) interfaces
> connected to a gigabit switch.
> 
> Perhaps it's worth mentioning that the vr(4) interfaces are part
> of a bridge(4). I'm not sure if that affects throughput but if
> it does plain vr(4) interfaces could be faster.
> 

-- 
Mark Patruck ( mark at wrapped.cx )
GPG key 0xF2865E51 / 187F F6D3 EE04 1DCE 1C74  F644 0D3C F66F F286 5E51

http://www.wrapped.cx

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