topic Re: R310 with SmartZone High Scale - RSSI arrive to R310 in Access Points - Indoor and Outdoor

R310 with SmartZone High Scale - RSSI arrive to R310

alejandro_vazqu — Wed, 13 Nov 2019 19:09:03 GMT

How to know RSSI arrive in the AP from the station client? Does exist CLI comand to know this information?

Re: R310 with SmartZone High Scale - RSSI arrive to R310

andrew_giancol1 — Wed, 13 Nov 2019 19:17:47 GMT

HI, SSH to the AP, enter your credentials.
use the command "Get wlanlist" to find your Wlan number ( for my example i'll use wlan35)
then use "get station" command in conjunction with the mac address, and the word "info"
here is my example

rkscli: get station wlan35 info 84:8E:0C:B9:70:69

MAC Addr AID Rate RSSI VLAN Idle ERP State Flags RecvSigStrength BTM BCR

-------------------------------------------------------------------------

84:8e:0c:b9:70:69 2 12M 53 1 0 0 4202b 0 -52 1 1

I hope that helps!

Re: R310 with SmartZone High Scale - RSSI arrive to R310

alejandro_vazqu — Wed, 13 Nov 2019 19:50:57 GMT

Hi, the value "RecvSigStrength" is signal strengh that arrive from station client to AP or that arrive from the AP to station client?
For example:
rkscli: get station wlan1 info 40:a1:08:d6:4c:a7
MAC Addr AID Rate RSSI VLAN Idle ERP State Flags RecvSigStrength BTM BCR
-------------------------------------------------------------------------
40:a1:08:d6:4c:a7 2 24M 50 172 0 0 203f 0 -62 1 1

"RSSI" is different to "RecvSigStrength". What values do they represent?

Re: R310 with SmartZone High Scale - RSSI arrive to R310

marcelo_vieira_ — Wed, 13 Nov 2019 20:25:27 GMT

RecvSigStrength and RSSI are different units of measurement that both represent the same thing: signal strength.

The difference is that RSSI is a relative index, while RecvSigStrength is an absolute number representing power levels in mW (milliwatts).

Re: R310 with SmartZone High Scale - RSSI arrive to R310

alejandro_vazqu — Wed, 13 Nov 2019 20:28:25 GMT

But signal strengh that show this command , is signal that arrive to AP from client or the signal from the AP to client?

Re: R310 with SmartZone High Scale - RSSI arrive to R310

albert_pierson — Mon, 09 Dec 2019 17:50:19 GMT

The RSSI value displayed in the Access Point is the measured signal strength over the noise floor setting converted to a relative value. This is most synonymous with SNR and is expressed as a pure ration in dB. The Access Point will calculate a received signal strength by adding the RSSI (SNR) to the Noise Floor (NF). This value is reported to the controller that will report this signal strength as RSSI (confusing) but now it is an absolute (albeit calculated) value in dBm.

The AP can only detect the signal strength of received signals from clients and only knows the data rate (MCS rate) used to transmit to the client. The signal from AP to client and the data rate the client is transmitting to the AP is not knowable by the AP.

The AP records the RSSI (SNR) for clients on each MIMO transmit chain for unicast packets and also ACK packets which may be higher as ACK messages from clients are sent at the basic rate/multicast rate for the WLAN/SSID which is often sent with higher power levels. This more complete view of RSSI can be found under "node stats" section of the AP support info file.

get station wlan stats all shows the combined RSSI (SNR) and transmit rate as a snapshot when taken. The AP support info file will also display this data and is a good reference to understand client connectivity and statistics.