Hello,
According to IEEE 802.11, every unicasted packet is acknowledged. I
captured a TCP data transfer session with ethereal, but saw no 802.11
Frame Control acknowledgement packets during this time. A desktop
machine, connected to Cisco Aironet 350 Access Point sent TCP data to
laptop with Cisco 350 wireless card. The card was in monitor mode. No
capture filter was used. No packet showed up when I used display filter
" wlan.fc.type == 1 and wlan.fc.subtype == 13 " for seeing packets of
802.11 acknowledgement type. I can see other type of 802.11 packets
like beacon frame.
The version information is -
ethereal 0.9.13
Compiled with GTK+ 1.2.10, with libpcap
current-cvs.tcpdump.org.2003.07.17, with libz 1.1.4, without UCD_SNMP
or Net-SNMP, without ADNS
Running on Linux 2.4.21
Has anybody seen similar behavior. Any suggestion for diagnosing this
would be helpful.
Thanks,
Shashwat