I've just set up a new two-hop backhaul using all ALIX boards but am having a significant throughput issue that doesn't make sense to me.

 XR5                        DCMA-82      DCMA-82               DCMA-82
Home<--------Ch50------------>ath0,Middle,ath1<-----Ch149------->End
10.220.8.1                10.220.8.2    10.220.9.2           10.220.9.1

Running iperf from either end against the middle gives up to 30 Mbs but running end-to-end barely yields the low teens. I've tried different radios and many variations on channels but am still stymied by low throughput when going through vs going *to* the middle node.

The ALIX boards are all BIOS 0.98 if that matters. Latest Voyage on everything and pretty generic at that. No encryption at this point.

Anyone seen or experienced anything similar? I can give as many gory details as needed.

Thanks,

Edwin

--
<=+=+=+==+=+=+==+=+=+=+=+=+=+=+=>
Edwin Whitelaw, P.E.
New River Valley Unwired, LLC
2200 Lonesome Dove Dr
Christiansburg, VA 24073
540-239-0318


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