Andrea Tassi wrote:
> Hi,
>
> I'm testing the latest OpenWrt trunk revision on my new UBNT
> RouterStation. I have discovered two problems:
>
> 1) I have tested the WAN port bandwidth with Iperf:
> [ 3] 0.0- 2.0 sec 7.08 MBytes 29.7 Mbits/sec
> [ ID] Interval Transfer Bandwidth
> [ 3] 2.0- 4.0 sec 7.04 MBytes 29.5 Mbits/sec
> [ ID] Interval Transfer Bandwidth
> [ 3] 4.0- 6.0 sec 7.02 MBytes 29.4 Mbits/sec
> [ ID] Interval Transfer Bandwidth
> [ 3] 6.0- 8.0 sec 7.02 MBytes 29.4 Mbits/sec
> as you can see the Bandwidth is ~29.5Mbits/sec and not ~100Mbits/sec.
> Is it normal??
I don't personaly know the ubqn hardware, but
that's what I'd expect from one of the older 200-300 Mhz mips devices
(wl500, wrt54, ...), not from a 600+ Mhz cpu. If I where to guess, I'd
say it should be arround 60 mbit.. Still I have not seen any mips based
hardware that delivers 100mbit routing performance. Alix and
avila/cambria are afaik the only openwrt devices that can do it.
You can check whether there are any stateful firewall rules in place
(especially NAT) , those significantly degrade performance.
Also switching on support for ebtables (filtering on the software
bridges) is known to degrade performance. This is afaik true even if the
module is not used, but just selected in the kernel config.
What is the frame size of your iperf, was it measured with 1500 byte
frames, or something smaller?
Did you measure routing, or did you measure with iperf running on the
device? If you run iperf on the device, than this would be a really good
value, since this is way slower than routing.
so long
harald
> 2) the LAN interface next to the WAN port has the same problem. The
> other port works but it has a very unstable behaviour: if I ping the
> RouterStation through a cable direct connected to the board I have a
> packet loss very height!!
>
> Any ideas? Thanks
> Andrea
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>
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