Radiotap Header - Wireless
Hi,
Working on project to define RSSI values of some devices. Using Cisco AP 2802i 4x4:3 to connect wireless clients to and getting those values:
Radiotap Header
Header revision: 0
Header pad: 0
Header length: 48
Present flags
MAC timestamp: 2446461763
Flags: 0x00
Data Rate: 6,0 Mb/s
Channel frequency: 5320 [A 64]
Channel flags: 0x0140, Orthogonal Frequency-Division Multiplexing (OFDM), 5 GHz spectrum
Antenna signal: -57 dBm
RX flags: 0x0000
Antenna signal: -63 dBm
Antenna: 0
Antenna signal: -59 dBm
Antenna: 1
Antenna signal: -66 dBm
Antenna: 2
As I could understand this AP has four antennas and three spatial streams. In example above I can only see three antennas Antenna 0, 1, 2 (or those are spatial streams?!) plus one antenna value which is -57dBm.
Anyone who can help me to understand what all those antenna values means?
Thanks in advance!
Another update: The client signal strength shown in Wireshark is always the same as value of Antenna 2
802.11 radio information
PHY type: 802.11a (OFDM) (5)
Turbo type: Non-turbo (0)
Data rate: 6,0 Mb/s
Channel: 64
Frequency: 5320MHz
Signal strength (dBm): -66 dBm
TSF timestamp: 1832499485
[Duration: 288µs]
Comments
Where is the 802.11 monitor mode capture from?
In particular, was that a capture done on the AP itself, or on another machine?
Hi Bob & Guy and thanks for reply - I'll try to answer to both of you in this comment...
Capture is from Wireshark (Windows version) and it has be done with Ekahau SideKick (which create PCAP file) connected directly to my computer - so this capture is not done on AP.
So, are those antennas really AP antennas or SideKicks or Windows machine antennas?