systemd systemd-report-netstat@.service 8 systemd-report-netstat@.service systemd-report-netstat.socket systemd-report-netstat Report network interface statistics as system report metrics systemd-report-netstat@.service systemd-report-netstat.socket /usr/lib/systemd/systemd-report-netstat systemd-report-netstat@.service is a metrics source for systemd-report1. It reports traffic counters and related properties of the network interfaces of the host, by implementing the io.systemd.Metrics Varlink interface on a socket linked into the /run/systemd/report/ directory. All network interfaces of the host's network namespace are enumerated, including the loopback interface. The data is acquired from the kernel via rtnetlink7, except for the link speed, see below. Note that this service is independent of systemd-networkd.service8, and reports on all interfaces, regardless of which component manages them. For each interface the following metrics are reported, with the interface name as metric object: io.systemd.NetworkStatistics.CarrierChanges The number of times the carrier state of the interface changed (counter). io.systemd.NetworkStatistics.Collisions The number of collisions during packet transmission (counter). io.systemd.NetworkStatistics.MTU The maximum transmission unit of the interface, in bytes (gauge). io.systemd.NetworkStatistics.ReceiveBytes The number of bytes received (counter). io.systemd.NetworkStatistics.ReceiveDropped The number of received packets that were dropped without an error, for example due to lack of buffer space (counter). io.systemd.NetworkStatistics.ReceiveErrors The total number of receive errors (counter). io.systemd.NetworkStatistics.ReceiveMulticastPackets The number of multicast packets received (counter). io.systemd.NetworkStatistics.ReceivePackets The number of packets received (counter). io.systemd.NetworkStatistics.SpeedBitsPerSecond The link speed, in bits per second. Only reported for interfaces whose driver reports a link speed and that are up and have a known speed, which typically means wired Ethernet interfaces. The value is read from the speed attribute of the interface in /sys/class/net/ (gauge). io.systemd.NetworkStatistics.TransmitBytes The number of bytes transmitted (counter). io.systemd.NetworkStatistics.TransmitDropped The number of packets dropped on transmission without an error (counter). io.systemd.NetworkStatistics.TransmitErrors The total number of transmit errors (counter). io.systemd.NetworkStatistics.TransmitPackets The number of packets transmitted (counter). io.systemd.NetworkStatistics.TransmitQueueLength The length of the transmit queue of the interface, in packets (gauge). Counters are maintained by the kernel per interface, and hence start from zero whenever an interface is (re-)created. The following metric fields are set on all metrics: ifindex The interface index, in decimal. Always set. type The type of the interface, as also shown in the Type column of networkctl1, i.e. the device type if the kernel reports one (for example wlan or bridge), and the hardware type otherwise (for example ether or loopback). Omitted if not known. kind The kind of the interface, for virtual interfaces, for example veth, bridge or wireguard. Omitted for physical interfaces. systemd1 systemd-report1 systemd-networkd.service8 rtnetlink7