[gypsy]

Running two 2610s, each with r13972 and 24db reflector antennas. With different radios, I once got 20mbit/s out of this link. With these 2610s, I struggle to break 1.5 mbit/s

Link distance is just over 6KM. ACK timing set to 6100 (shows up as 63 microseconds - 6300m on both ends), devices set to WDS AP and WDS Station, with no MAC restrictions. No security enabled. Radio 1 is set to 28db and is seen by Radio 2 with a 22 SNR (-74 -96), while Radio 2 is set to 27db and is seen by Radio 1 with a SNR of 31 (-67 -98). They both sync anywhere between 12 and 24Mbps. Antenna gain is set to 0 on both devices.

During transfer, pings shoot from 4-5ms to somewhere in the hundreds, with dropped pings every now and then. I have set ACK timing to 12200 (2x) as well, with basically no noticeable change.

Enabling Extended Range mode with 6100 ACK causes a slight slowdown and ping time increases. Setting ACK to 12200 drastically reduces speeds and pings shoot through the roof (unstable even at idle). All other options are disabled (including noise detection, although enabling it has no effect on throughoutput). The link is running on CH13 - quite clean around here, and the same channel I previously got 20mbit/s on.

Speeds are set to auto on both ends. If I set them both to BG-Mixed, they sync at 11 TX/RX on both ends after a while, and for some time I can get up to 3.6mbit/s (3.3 sustained). This is the maximum I have seen this equipment go. Every now and then, speeds will drop to 1.2-1.5mbit/s for 20 seconds or so, jumping to the 3mbit/s range after a while.

The SNR looks pretty decent and the signal pretty strong, the radios are linking at pretty high rates as well. Should I not be able to get better speeds? What would be the recommended settings to use (preferably option by option)?

Thanks =)

EDIT: Should mention: forcing them to say 12Mbps on both ends causes them to link up (they show up as clients in each other's interfaces), but no packets are passed. So far I've been unable to successfully pass packets across a link with forced settings. Any idea why this would happen?

[MichelG]

Hi, try enabling antenna diversity, secondary antenna on RX an TX , and physical antenna switch to EXT.

Try adjusting your settings for 7000m on both sides, and long preamble.

Michel

[majinsoftware]

Also 1 other thing to try, Whats the connection like using the internal antenna.

Iv found that with dd wrt firmware only the internal antenna works proply and using a external one it still uses 1 internal pannel aswell as the external one which slows it down. As it switches between them every so often.

[gypsy]

MichelG: both TX and RX were already set to Secondary, and the hardware switch set to EXT on both devices. There is no setting to enable long preamble, but there is a short preamble enable/disable; it is set to disabled, enabling it gives a very slight speed reduction.

Setting ACK to 7000m results in a slight speed reduction and ping increase. 8000 even more so. 5500 and 5000 as well (with 5000 they would link up, but no packets could be passed).

Using the internal antennas (setting TX/RX to Primary) results in no link: this makes sense, as the radios are not facing each other. To be honest, I very much doubt the performance of the internal antennas could beat a pair of directional 24db mesh antennas over 6KM.

Any other suggestions are very welcome.

[MichelG]

Hi Gypsy, just thought of a stupid thing. I did reduce my settings to 15dB / 18dB / 20dB, instead of full power, and it did increase stability and speed. I know that 450-500m are not as 6Km, but consider I have a building with a lot of glass and metal inbetween.

Also, give a try using channels under 10, you might be surprised.

Michel.

[phibir]

http://www.dd-wrt.com/phpBB2/viewtopic.php?t=67598&start=30