Okay, I'm a bit puzzled here, and since there are a few folks out there
playing with these, maybe you'll have some advice.
I just put up a pair of RouterBoard 532s for a heavily-trafficked
backhaul link. It's about as simple a setup as you can get - just
Ethernet up to one Atheros, running as an AP, across a 1/2 mile link to
a client, back down the Ethernet. Simple enough, eh? Since it's just one
radio hop, I haven't set up WDS or anything fancy, just a few simple
routing statements to direct traffic from one end to the other.
Using the RouterOS built-in tests, this link claims to be capable of
almost 40Mbps one-way. I know the tests are somewhat idealized, and
probably a bit optimistic, but I'm having trouble getting speeds even a
third of that.
I don't believe it's an RF issue, because it's a short link with good
antennas. Signal strength is around -58, noise is in the mid-90s. Also,
when there's no other traffic on the link, I can get the same "test"
performance there that I was getting on my workbench, where the built-in
bandwidth tests report 35+ Mbps.
It's just that the darn boards seem to choke in the face of real-world
traffic. (My real traffic load is around 10Mbps aggregate, balanced
about 80-20 between upload and download.)
I've tried hopping around to different frequencies, which I didn't
expect to help. I've tried both enabling and disabling their proprietary
NStreme protocol, and enabling/disabling radio compression. I haven't
yet experimented with M3P (the "packet packer protocol" option), but I'm
a bit skeptical on it as well.
The (informal) testing I've done thus far shows the link not really
handling traffic beyond about 15Mbps or so. (The "informal" testing was
done with a few Web-based speed tests. More formal testing, with tools
like nuttcp or qcheck, will be coming soon, but I'm really skeptical at
Any suggestions on how to further tune the performance on these boards
would be welcome.
"You don't seem the lying kind... a shame that I can read your mind."
WISPA Wireless List: firstname.lastname@example.org