On 2013-04-05 5:24 PM, Harshal Chhaya wrote: > Hello, > > We have an AR9342-based AP that is sending out two odd packets each > beacon interval. These packets are 1804 bytes in size, are transmitted > at 6.5Mbps and have the dest MAC address the same as the source MAC > address. > > The payload of these packets is all zeros. > > It does this only in 5Ghz. These packets aren't transmitted in the 2.4Ghz band. > > If we set the bandwidth to 40MHz, it sends only one of these packets > between beacons. > > Are these some control or mgmt packets that are part of the protocol? > Or is this unexpected behavior? > > The AP is running the 3.3.8 kernel and a compat-wireless from Sep 2012 > (part of the openwrt image for this chip). Maybe it's (failing) PA predistortion calibration, which needs to send training frames to complete. I'd suggest trying a newer compat-wireless version, this type of calibration has been disabled there because of various issues (including hardware damage on some chips). - Felix -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
