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Revision 2

updated 2022-09-19 20:15:11 +0000

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]

Revision 1

AirAO

asked 2022-09-19 10:47:39 +0000

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.~~ spatialstreams. In example above I can only see three antennas Antenna 0, 1, 2 (or those are ~~spatial streams?!)~~ spatialstreams?!) plus one antenna value which is -57dBm.

Anyone who can help me to understand what all those antenna values means?

Thanks in ~~advance!~~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]