netdata/health/health.d/net.conf

# you can disable an alarm notification by setting the 'to' line to: silent

# -----------------------------------------------------------------------------
# net traffic overflow

 template: interface_speed
       on: net.net
    class: Latency
     type: System
component: Network
       os: *
    hosts: *
 families: *
     calc: ( $nic_speed_max > 0 ) ? ( $nic_speed_max) : ( nan )
    units: Mbit
    every: 10s
     info: network interface ${label:device} current speed

 template: 1m_received_traffic_overflow
       on: net.net
    class: Workload
     type: System
component: Network
       os: linux
    hosts: *
 families: *
   lookup: average -1m unaligned absolute of received
     calc: ($interface_speed > 0) ? ($this * 100 / ($interface_speed)) : ( nan )
    units: %
    every: 10s
     warn: $this > (($status >= $WARNING)  ? (85) : (90))
    delay: up 1m down 1m multiplier 1.5 max 1h
     info: average inbound utilization for the network interface ${label:device} over the last minute
       to: sysadmin

 template: 1m_sent_traffic_overflow
       on: net.net
    class: Workload
     type: System
component: Network
       os: linux
    hosts: *
 families: *
   lookup: average -1m unaligned absolute of sent
     calc: ($interface_speed > 0) ? ($this * 100 / ($interface_speed)) : ( nan )
    units: %
    every: 10s
     warn: $this > (($status >= $WARNING)  ? (85) : (90))
    delay: up 1m down 1m multiplier 1.5 max 1h
     info: average outbound utilization for the network interface ${label:device} over the last minute
       to: sysadmin

# -----------------------------------------------------------------------------
# dropped packets

# check if an interface is dropping packets
# the alarm is checked every 1 minute
# and examines the last 10 minutes of data
#
# it is possible to have expected packet drops on an interface for some network configurations
# look at the Monitoring Network Interfaces section in the proc.plugin documentation for more information

 template: inbound_packets_dropped
       on: net.drops
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: *
   lookup: sum -10m unaligned absolute of inbound
    units: packets
    every: 1m
     info: number of inbound dropped packets for the network interface ${label:device} in the last 10 minutes

 template: outbound_packets_dropped
       on: net.drops
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: *
   lookup: sum -10m unaligned absolute of outbound
    units: packets
    every: 1m
     info: number of outbound dropped packets for the network interface ${label:device} in the last 10 minutes

 template: inbound_packets_dropped_ratio
       on: net.packets
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: !wl* *
   lookup: sum -10m unaligned absolute of received
     calc: (($inbound_packets_dropped != nan AND $this > 10000) ? ($inbound_packets_dropped * 100 / $this) : (0))
    units: %
    every: 1m
     warn: $this >= 2
    delay: up 1m down 1h multiplier 1.5 max 2h
     info: ratio of inbound dropped packets for the network interface ${label:device} over the last 10 minutes
       to: sysadmin

 template: outbound_packets_dropped_ratio
       on: net.packets
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: !wl* *
   lookup: sum -10m unaligned absolute of sent
     calc: (($outbound_packets_dropped != nan AND $this > 1000) ? ($outbound_packets_dropped * 100 / $this) : (0))
    units: %
    every: 1m
     warn: $this >= 2
    delay: up 1m down 1h multiplier 1.5 max 2h
     info: ratio of outbound dropped packets for the network interface ${label:device} over the last 10 minutes
       to: sysadmin

 template: wifi_inbound_packets_dropped_ratio
       on: net.packets
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: wl*
   lookup: sum -10m unaligned absolute of received
     calc: (($inbound_packets_dropped != nan AND $this > 10000) ? ($inbound_packets_dropped * 100 / $this) : (0))
    units: %
    every: 1m
     warn: $this >= 10
    delay: up 1m down 1h multiplier 1.5 max 2h
     info: ratio of inbound dropped packets for the network interface ${label:device} over the last 10 minutes
       to: sysadmin

 template: wifi_outbound_packets_dropped_ratio
       on: net.packets
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: wl*
   lookup: sum -10m unaligned absolute of sent
     calc: (($outbound_packets_dropped != nan AND $this > 1000) ? ($outbound_packets_dropped * 100 / $this) : (0))
    units: %
    every: 1m
     warn: $this >= 10
    delay: up 1m down 1h multiplier 1.5 max 2h
     info: ratio of outbound dropped packets for the network interface ${label:device} over the last 10 minutes
       to: sysadmin

# -----------------------------------------------------------------------------
# interface errors

 template: interface_inbound_errors
       on: net.errors
    class: Errors
     type: System
component: Network
       os: freebsd
    hosts: *
 families: *
   lookup: sum -10m unaligned absolute of inbound
    units: errors
    every: 1m
     warn: $this >= 5
    delay: down 1h multiplier 1.5 max 2h
     info: number of inbound errors for the network interface ${label:device} in the last 10 minutes
       to: sysadmin

 template: interface_outbound_errors
       on: net.errors
    class: Errors
     type: System
component: Network
       os: freebsd
    hosts: *
 families: *
   lookup: sum -10m unaligned absolute of outbound
    units: errors
    every: 1m
     warn: $this >= 5
    delay: down 1h multiplier 1.5 max 2h
     info: number of outbound errors for the network interface ${label:device} in the last 10 minutes
       to: sysadmin

# -----------------------------------------------------------------------------
# FIFO errors

# check if an interface is having FIFO
# buffer errors
# the alarm is checked every 1 minute
# and examines the last 10 minutes of data

 template: 10min_fifo_errors
       on: net.fifo
    class: Errors
     type: System
component: Network
       os: linux
    hosts: *
 families: *
   lookup: sum -10m unaligned absolute
    units: errors
    every: 1m
     warn: $this > 0
    delay: down 1h multiplier 1.5 max 2h
     info: number of FIFO errors for the network interface ${label:device} in the last 10 minutes
       to: sysadmin

# -----------------------------------------------------------------------------
# check for packet storms

# 1. calculate the rate packets are received in 1m: 1m_received_packets_rate
# 2. do the same for the last 10s
# 3. raise an alarm if the later is 10x or 20x the first
# we assume the minimum packet storm should at least have
# 10000 packets/s, average of the last 10 seconds

 template: 1m_received_packets_rate
       on: net.packets
    class: Workload
     type: System
component: Network
       os: linux freebsd
    hosts: *
 families: *
   lookup: average -1m unaligned of received
    units: packets
    every: 10s
     info: average number of packets received by the network interface ${label:device} over the last minute

 template: 10s_received_packets_storm
       on: net.packets
    class: Workload
     type: System
component: Network
       os: linux freebsd
    hosts: *
 families: *
   lookup: average -10s unaligned of received
     calc: $this * 100 / (($1m_received_packets_rate < 1000)?(1000):($1m_received_packets_rate))
    every: 10s
    units: %
     warn: $this > (($status >= $WARNING)?(200):(5000))
     crit: $this > (($status == $CRITICAL)?(5000):(6000))
  options: no-clear-notification
     info: ratio of average number of received packets for the network interface ${label:device} over the last 10 seconds, \
           compared to the rate over the last minute
       to: sysadmin