airOS v5.5.4 User Guide - Ubiquiti Networks

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airOS v5.5.4 User GuideSSID Displays the wireless network name (SSID). Thewireless network name depends upon the wireless modeselected:• In Station mode, this displays the SSID of the AP thedevice is associated with.• In Access Point mode, this displays the SSID configuredon the device using the Wireless tab.Security Displays the wireless security method beingused on the device. If None is displayed, then wirelesssecurity has been disabled, although you can still useRADIUS MAC authentication.Version Displays the airOS software version.Uptime This is the total time the device has been runningsince the latest reboot (when the device was powered up)or software upgrade. The time is displayed in days, hours,minutes, and seconds.Date Displays the current system date and time. Thedate and time are displayed in YEAR-MONTH-DAYHOURS:MINUTES:SECONDS format. The system date andtime is retrieved from the Internet using NTP (NetworkTime Protocol). The NTP Client is disabled by default onthe Services tab. The device doesn’t have an internal clock,and the date and time may be inaccurate if the NTP Clientis disabled or the device isn’t connected to the Internet.Channel/Frequency Displays the channel number andcorresponding operating frequency. The device usesthe channel and radio frequency specified to transmitand receive data. Valid channel and frequency rangeswill vary depending on local country regulations. If theChannel/Frequency is labeled as “DFS”, then the device isusing a DFS (Dynamic Frequency Selection) channel. (DFSchannels/frequencies are not available on all devices.)Channel Width This is the spectral width of the radiochannel used by the device. airOS v5.5 supports 3, 5, 7,8, 10, 14, 20, 25, 28, 30, and 40 MHz; however, availablechannel widths are device-specific. In Station mode, Auto20/40 MHz is the value by default.Distance Displays the current distance between devicesin kilometers and miles for Acknowledgement (ACK)frames. Changing the distance value will change theACK (Acknowledgement) timeout accordingly. The ACKtimeout specifies how long the device should wait foran acknowledgement from a partner device confirmingpacket reception before it concludes that there has beenan error and resends the packet. You can adjust theDistance value; for more information, see “Distance” onpage 50).TX/RX Chains Displays the number of independentspatial data streams the device is transmitting (TX)and receiving (RX) simultaneously within one spectralchannel of bandwidth. This ability is specific to 802.11ndevices that rely on Multiple-Input Multiple-Output(MIMO) technology. Multiple chains increase data transferperformance significantly. The number of chains Ubiquitidevices use is hardware-specific because every TX/RXchain requires a separate antenna.Ubiquiti Networks, Inc.Chapter 3: Main TabAntenna (Only applicable to the NanoStationM900 loco.)The antenna type (Internal, External, or External + Internal)is displayed. For more information, see “Antenna” onpage 21.WLAN0 MAC Displays the MAC address of the device asseen on the wireless network.LAN0 MAC Displays the MAC address of the device asseen on the LAN.LAN1 MAC Displays the MAC address of the deviceas seen on the WAN interface. This is the device’s MACaddress as seen over the Internet.LAN0/LAN1 Indicates the current status of the WAN andLAN Ethernet port connections. This can indicate that acable is not plugged into a device or there is no activeEthernet connection.AP MAC In Access Point or AP‐Repeater mode, thisdisplays the MAC address of the device. In Station mode,this displays the MAC address of the AP the device isassociated with.Signal Strength (Available in Station mode only.)Displays the received wireless signal level (client-side).The represented value coincides with the graphical bar.Use the antenna alignment tool to adjust the deviceantenna to get a better link with the wireless device. Theantenna of the wireless client has to be adjusted to getthe maximum signal strength. Signal Strength is measuredin dBm (the decibels referenced to 1 milliwatt). Theconversion is defined as dBm=10log10(P/1mW). So, 0 dBmwould be 1 mW and -72 dBm would be 0.0000006 mW.A signal strength of -80 dBm or better (-50 to -70 dBm) isrecommended for stable links.Chain or Horizontal/Vertical or External/Internal(Vertical) (Available in Station mode only.) Displaysthe wireless signal level (in dBm) of each signal. Deviceswith fixed antennas display Horizontal/Vertical instead ofChain. When chains are displayed, the number of chains isdevice-specific.The NanoStationM900 loco displays External/Internal(Vertical) if the Antenna option on the Wireless tab is setto External + Internal (2x2). For more information, see“Antenna” on page 21.Connections (Available in Access Point or AP‐Repeatermode only.) Displays the number of wireless devicesconnected to the device.Noise Floor Displays the current value (in dBm) of theenvironmental noise (from interference) the receiver hearson the operating frequency. airOS considers the NoiseFloor while evaluating the signal quality (Signal-to-NoiseRatio SNR, RSSI). The value mean depends on the signalstrength above the Noise Floor.Transmit CCQ This index evaluates the wireless ClientConnection Quality (CCQ). The level is based on apercentage value for which 100% corresponds to a perfectlink state.11
airOS v5.5.4 User GuideTX Rate/RX Rate (Available in Station mode only.)Displays the current 802.11 data transmission (TX) anddata reception (RX) rates.airMAX Indicates the airMAX status. If airMAX is enabled,the device will only accept airMAX clients. airMAX alsofeatures advanced QoS autodetection settings. For moreinformation, refer to “airMAX Settings” on page 4.Note: For compatibility, legacy or 802.11 a/b/gdevices should use legacy firmware with airMAXsupport (such as airOS firmware v4.0). Legacyclients can only work as airMAX clients with the MSeries device acting as an airMAX AP.airMAX Priority Available if airMAX is enabled in Stationmode only. Indicates the airMAX Priority set on the Ubiquitilogo tab. By default the AP gives all active clients the sameamount of time. However, if the clients are configured withdifferent priorities, the AP will give clients more or lesstime, depending on the priority.airMAX Quality Available if airMAX is enabled. airMAXQuality (AMQ) is based on the number of retries and thequality of the physical link. If this value is low, you mayhave interference and need to change frequencies. If AMQis above 80% and you do not notice any other issues, thenyou do not need to make any changes.airMAX Capacity Available if airMAX is enabled. airMAXCapacity (AMC) is based on airtime efficiency. For example,if you have one client with a low data rate or you are usinga 1x1 device (such as Bullet or airGrid) alongside otherclients that are 2x2, then it will use up more airtime (slots)for the same amount of data, reducing time (or capacity)for other clients. The lower the AMC, the less efficient theAP is. If you only have one client, this may not matter, butwhen you have many clients (for example, more than 30),then AMC becomes very important, and you want it to beas high as possible.If you are looking at the client, AMC shows the theoreticalcapacity of that client, based on current TX/RX rates andquality. AMC is a percentage based on what the maximumperformance would be if the link were perfect. Clientswith poor airtime efficiency can negatively affect otherclients by taking up more airtime while transmitting atlower speeds. For example, client A is at MCS 12 (78 Mbps)because of low signal. The client could theoreticallydo MCS 15 (130 Mbps), so AMC is based on the ratioof current rate/maximum rate (78 Mbps divided by130 Mbps), which is 60%. In a similar fashion, a 1x1 devicewill always have a maximum AMC of 50%, because itprovides half the performance of a 2x2 device.If you are looking at the AP, then AMQ and AMC areaverages of all clients’ values. If you want to discoverwhat is lowering your values on heavily populated APs,single out the weak clients. You can either use airControl (recommended), or you can go to each client individually.Try to upgrade to a higher-gain antenna (to allow a betterdata rate), or upgrade to a 2x2 device if you are using a1x1 device.Ubiquiti Networks, Inc.Chapter 3: Main TabairSelect Indicates the airSelect status. If airSelect isenabled, airSync is not available. Access airSelect setupthrough the Ubiquiti Logo tab > airSelect.Hop Interval Available if airSelect is enabled. The duration(in milliseconds) that the AP will stay on one frequencybefore moving to the next.airSync (GPS Series Only) Indicates the airSync status. IfairSync is enabled, airSelect is not available, and the devicein Master mode reports the number of airSync-enableddevices in Slave mode. Access airSync setup through theUbiquiti Logo tab > airSync.GPS Signal Quality (GPS Series Only) Displays GPSsignal quality as a percentage value on a scale of 0-100%.Latitude/Longitude (GPS Series Only) Based onGPS tracking, reports the device’s current latitude andlongitude. Clicking the link opens the reported latitudeand longitude in a browser using Google Maps (http://maps.google.com).Altitude (GPS Series Only) Based on GPS tracking,reports the device’s current altitude above sea level.Custom Scripts Displayed if custom scripts are presenton the device. If custom scripts are running, then the Maintab displays the status of this option as “Enabled”.MonitorThere are various monitoring tools accessible via thelinks on the Main tab. The default is Throughput, which isdisplayed when you first open the Main tab.ThroughputThroughput displays the current data traffic on the LANand WLAN in both graphical and numerical form. Thechart scale and throughput dimension (Bps, Kbps, Mbps)change dynamically depending on the mean throughputvalue. The statistics are updated automatically.Refresh If there is a delay in the automatic update, clickRefresh to manually update the statistics.12
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