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Access point monitoring with Netdata

The ap collector visualizes data related to access points.

Example Netdata charts

image

How it works

It does the following:

  1. Runs iw dev searching for interfaces that have type AP.

    From the same output it collects the SSIDs each AP supports by looking for lines ssid NAME.

    Example:

# iw dev
phy#0
        Interface wlan0
                ifindex 3
                wdev 0x1
                addr 7c:dd:90:77:34:2a
                ssid TSAOUSIS
                type AP
                channel 7 (2442 MHz), width: 20 MHz, center1: 2442 MHz

  1. For each interface found, it runs iw INTERFACE station dump.

    From the output is collects:

    • rx/tx bytes
    • rx/tx packets
    • tx retries
    • tx failed
    • signal strength
    • rx/tx bitrate
    • expected throughput

    Example:

# iw wlan0 station dump
Station 40:b8:37:5a:ed:5e (on wlan0)
        inactive time:  910 ms
        rx bytes:       15588897
        rx packets:     127772
        tx bytes:       52257763
        tx packets:     95802
        tx retries:     2162
        tx failed:      28
        signal:         -43 dBm
        signal avg:     -43 dBm
        tx bitrate:     65.0 MBit/s MCS 7
        rx bitrate:     1.0 MBit/s
        expected throughput:    32.125Mbps
        authorized:     yes
        authenticated:  yes
        preamble:       long
        WMM/WME:        yes
        MFP:            no
        TDLS peer:      no

  1. For each interface found, it creates 6 charts:

    • Number of Connected clients
    • Bandwidth for all clients
    • Packets for all clients
    • Transmit Issues for all clients
    • Average Signal among all clients
    • Average Bitrate (including average expected throughput) among all clients

Configuration

Edit the charts.d/ap.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata   # Replace this path with your Netdata config directory, if different
sudo ./edit-config charts.d/ap.conf

You can only set ap_update_every=NUMBER to change the data collection frequency.

Auto-detection

The plugin is able to auto-detect if you are running access points on your linux box.

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