Nagios Plugin check_network

check_network - displays some network interfaces statistics

[/etc/nrpe.d/check_network]
command[check_network]=/usr/lib/nagios/plugins/check_network

Usage note

This plugin displays some network interfaces.statistics.
Copyright (C) 2014,2015,2020 Davide Madrisan <davide.madrisan@gmail.com>
Usage:
  check_network [-klW] [-bCdemp] [-i <ifname-regex>] [delay]
  check_network [-klW] [-bCdemp] [-i <ifname-regex>] --ifname-debug
Options:
  -i, --ifname         only display interfaces matching a regular expression
      --ifname-debug   display the list of metric keys and exit
  -k, --check-link     report an error if at least a link is down
  -l, --no-loopback    skip the loopback interface
  -W, --no-wireless    skip the wireless interfaces
  -%, --perc           return percentage metrics if possible
  -w, --warning COUNTER   warning threshold
  -c, --critical COUNTER   critical threshold
  -h, --help      display this help and exit
  -V, --version   output version information and exit
  delay is the delay between the two network snapshots in seconds (default: 1sec)
  By default all the counters are reported in the output but it's possible to select a subset of them:
  -b  --no-bytes       omit the rx/tx bytes counter from perfdata
  -C, --no-collisions  omit the collisions counter from perfdata
  -d  --no-drops       omit the rx/tx drop counters from perfdata
  -e  --no-errors      omit the rx/tx errors counters from perfdata
  -m, --no-multicast   omit the multicast counter from perfdata
  -p, --no-packets     omit the rx/tx packets counter from perfdata
  -r, --rx-only        consider the received traffic only in the thresholods
  -t, --tx-only        consider the transmitted traffic only in the thresholds
Note:
  - The option --ifname supports the POSIX Extended Regular Expression syntax.
    See: https://man7.org/linux/man-pages/man7/regex.7.html
  - You cannot select both the options r/rx-only and t/tx-only.
Examples:
  check_network
  check_network --check-link --ifname "^(enp|eth)" 15
  check_network --check-link --ifname ^wlp --warning 645120 15
  check_network --ifname "^(enp|wlp)" --ifname-debug -Cdm
  check_network --perc --ifname "^(enp|eth)" -w 80% 15
  check_network --no-loopback --no-wireless 15

Example of output

$ ./plugins/check_network --ifname "^(enp|wlp)" --ifname-debug -Cdm
enp1s0 (NO-CARRIER)
 - enp1s0_txbyte/s       enp1s0_rxbyte/s
 - enp1s0_txerr/s        enp1s0_rxerr/s
 - enp1s0_txpck/s        enp1s0_rxpck/s
wlp2s0
 - wlp2s0_txbyte/s       wlp2s0_rxbyte/s
 - wlp2s0_txerr/s        wlp2s0_rxerr/s
 - wlp2s0_txpck/s        wlp2s0_rxpck/s

$ ./plugins/check_network --ifname "^(enp|wlp)"
network OK - found 2 interface(s): enp1s0,wlp2s0 | enp1s0_txbyte/s=0 enp1s0_rxbyte/s=0 enp1s0_txerr/s=0 enp1s0_rxerr/s=0 enp1s0_txdrop/s=0 enp1s0_rxdrop/s=0 enp1s0_txpck/s=0 enp1s0_rxpck/s=0 enp1s0_coll/s=0 enp1s0_mcast/s=0 wlp2s0_txbyte/s=0 wlp2s0_rxbyte/s=66 wlp2s0_txerr/s=0 wlp2s0_rxerr/s=0 wlp2s0_txdrop/s=0 wlp2s0_rxdrop/s=0 wlp2s0_txpck/s=0 wlp2s0_rxpck/s=1 wlp2s0_coll/s=0 wlp2s0_mcast/s=0 

Performance data

lo_txpck/s lo_rxpck/s lo_txbyte/s lo_rxbyte/s lo_txerr/s lo_rxerr/s lo_txdrop/s lo_rxdrop/s lo_mcast/s lo_mcast/s lo_coll/s enp1s0_txpck/s enp1s0_rxpck/s ... docker0_txpck/s docker0_rxpck/s ...