David Young wrote: > On Fri, Jul 25, 2008 at 03:50:17PM +0200, Emilio Ancillotti wrote: >> Hi there, >> >> I have a problem using my soekris 4801 with two miniPCI wireless cards >> (R52H High Power Mikrotik 802.11a/b/g mPCI). >> >> The problem is the following. When each wireless card works alone >> I have not problem, and I obtain a throughput of about 24-25Mbps. >> However, when both cards work simultaneously, the per flow throughput >> of each cards is reduce of about 40%, even if the two wireless cards >> use different channels (1 and 11). > > Are the antennas very close? Within a foot of each other? When the > antennas of the two radios are very close, they may interfere with each > other, even at opposite ends of the 2.4GHz ISM band. It is also possible > that two radios in the same box will interfere at the intermediate > frequency (IF). Jim Thompson has written about the various ways that > two colocated radios can interfere, even on so-called "non-overlapping" > 802.11 channels. A Google search will probably turn up his discussion > of the issues. >
So then to the users here organize their networks to avoid radio contention? My immediate thought would be to use limit units to 1 radio each and connect a pair of units through a small switch, but that sounds like an expensive messy hack. Comments? _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
