On Sat, 01 Apr 2017 02:14:18 +0800, Hao Zhang said: > hi all, > i use usb wifi dongle rt5370/rt3070/rtl8192cus/rtl8178 on embeded > board based kernel 3.10.0 , they all loss packet when ping to router, > and then ifconfig can show below that > it seem some packet were been dropped, What does that dropped means? > RX packets:235 errors:0 dropped:4 overruns:0 frame:0 On wireless, the most likely cause is RF noise causing a mangled packet that gets dropped due to CRC checks and the like. 4 dropped packets isn't time to start worrying - network protocols are supposed to retransmit if it becomes clear that a packet was lost. If the packet loss is high enough that it actually impacts throughput, your best bet is to move the base station to a different wireless channel. If you're using a 2.4Gz device, moving to 5Ghz (if possible) may help a lot, as the 2.4 band is full of microwave ovens and other sources of RF noise.
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