Logging the signal-to-noise ratio and signal strength per client

The signal-to-noise ratio (snr) and signal strength (signal) are logged per client in the WiFi event and traffic logs.

When a WiFi client connects to a tunnel or local-bridge mode SSID on an FortiAP that is managed by a FortiGate, signal-to-noise ratio and signal strength details are included in WiFi event logs for local-bridge traffic statistics and authentication, and in forward traffic logs for tunnel traffic. This allows you to store and view clients' historical signal strength and signal-to-noise ratio information.

To verify when a client is connecting to an SSID:

1. Go to Log & Report > Events and select WiFi Events from the events drop-down list.

   The Signal and Signal/Noise columns show the signal strength and signal-to-noise ratio for each applicable client.

   

2. WiFi event log messages include the signal and snr values:

   date=2020-05-27 time=11:26:28 logid="0104043579" type="event" subtype="wireless" level="notice" vd="vdom1" eventtime=1590603988877156921 tz="-0700" logdesc="Wireless client IP assigned" sn="FP231ETF20000455" ap="FP231ETF20000455" vap="stability3" ssid="FOS_QA_Starr_140E_Guest-11" radioid=1 user="N/A" group="N/A" stamac="1c:87:2c:b6:a8:49" srcip=11.10.80.2 channel=6 radioband="802.11n,g-only" signal=-45 snr=50 security="WPA2 Personal" encryption="AES" action="client-ip-detected" reason="Reserved 0" mpsk="N/A" msg="Client 1c:87:2c:b6:a8:49 had an IP address detected (by DHCP packets)."

   date=2020-05-27 time=11:26:11 logid="0104043573" type="event" subtype="wireless" level="notice" vd="vdom1" eventtime=1590603970962702892 tz="-0700" logdesc="Wireless client authenticated" sn="FP231ETF20000455" ap="FP231ETF20000455" vap="stability3" ssid="FOS_QA_Starr_140E_Guest-11" radioid=1 user="N/A" group="N/A" stamac="1c:87:2c:b6:a8:49" srcip=0.0.0.0 channel=6 radioband="802.11n,g-only" signal=-45 snr=50 security="WPA2 Personal" encryption="AES" action="client-authentication" reason="Reserved 0" mpsk="N/A" msg="Client 1c:87:2c:b6:a8:49 authenticated."

To verify tunnel traffic when a client is connecting to a tunnel mode SSID:

1. Go to Log & Report > Forward Traffic.

   The Signal and Signal/Noise columns show the signal strength and signal-to-noise ratio for each applicable client.

   

2. Forward traffic log messages include the signal and snr values:

   date=2020-05-27 time=11:30:26 logid="0000000013" type="traffic" subtype="forward" level="notice" vd="vdom1" eventtime=1590604226533016978 tz="-0700" srcip=11.10.80.2 srcname="WIFI23" srcport=53926 srcintf="stability3" srcintfrole="lan" srcssid="FOS_QA_Starr_140E_Guest-11" apsn="FP231ETF20000455" ap="FP231ETF20000455" channel=6 radioband="802.11n,g-only" signal=-31 snr=64 dstip=91.189.91.157 dstport=123 dstintf="wan1" dstintfrole="wan" srccountry="United States" dstcountry="United States" sessionid=322069 proto=17 action="accept" policyid=13 policytype="policy" poluuid="7c14770c-1456-51e9-4c57-806e9c499782" policyname="wmm" service="NTP" trandisp="snat" transip=172.16.200.111 transport=53926 appid=16270 app="NTP" appcat="Network.Service" apprisk="elevated" applist="g-default" duration=180 sentbyte=76 rcvdbyte=76 sentpkt=1 rcvdpkt=1 utmaction="allow" countapp=1 osname="Linux" mastersrcmac="1c:87:2c:b6:a8:49" srcmac="1c:87:2c:b6:a8:49" srcserver=0 utmref=65534-66

To verify local-bridge traffic statistics when a client is connecting to a local-bridge mode SSID:

1. Go to Log & Report > Events and select WiFi Events from the events drop-down list.

   The Signal and Signal/Noise columns show the signal strength and signal-to-noise ratio for each applicable client.

   

2. WiFi event log messages include the signal and snr values:

   date=2020-05-26 time=17:48:57 logid="0104043687" type="event" subtype="wireless" level="information" vd="vdom1" eventtime=1590540537841497433 tz="-0700" logdesc="Traffic stats for station with bridge wlan" sn="FP231ETF20000455" ap="FP231ETF20000455" vap="wifi.fap.01" ssid="FOS_QA_Starr-140E-LB-cap-2" srcip=10.128.100.4 user="N/A" stamac="00:1e:e5:df:b1:63" signal=-53 snr=52 sentbyte=8970016 rcvdbyte=985910 nextstat=300 action="sta-wl-bridge-traffic-stats" msg="Traffic stats for bridge ssid client 00:1e:e5:df:b1:63"