Monitoring individual ports on a network switch

Service Monitoring
1

I want to monitor each individual ports on a network switch and I’m able to do so with the following code:

apply Service for (interface => config in host.vars.snmp_interfaces) {
  import "generic-service"

  display_name = "Network traffic on " + config.snmp_interface_label
  check_command = "snmp-interface"

  vars.snmp_interface_ifname = "true"
  vars.snmp_interface_noregexp = "true"
  vars.snmp_warn = "100,100"
  vars.snmp_crit = "100,100"
  vars += config

  assign where host.vars.snmp_address
}

On the host configuration file, I have the following code:

  vars.snmp_interfaces["snmp-int-port1"] = {
    snmp_interface = "1"
    snmp_interface_label = "port 1"
  }

The problem is that since the network switch has 52 ports, I’ll need to create 52 entries for the above code. Is there a simpler and more efficient way of doing this?

2

I’ve found a better way around this by creating a template and copy and paste the snmp_interfaces[""] code with the updated port number. By doing this, I should be able to reuse this template for other Network switch. Also, it will keep my host configuration file cleaner.

3

Hi,

can you share the concrete solution for others looking into your topic too?

Thanks,
Michael

4

Sure!

Basically, I have created a template that contains the interface information named int-ports-template.conf

template Host "int-ports-template" {

  vars.snmp_interfaces["snmp-int-port1"] = {
    snmp_interface = "1"
    snmp_interface_label = "port 01"
    grafana_graph_disable = true
  }

  vars.snmp_interfaces["snmp-int-port2"] = {
    snmp_interface = "2"
    snmp_interface_label = "port 02"
    grafana_graph_disable = true
  }

  vars.snmp_interfaces["snmp-int-port3"] = {
    snmp_interface = "3"
    snmp_interface_label = "port 03"
    grafana_graph_disable = true
  }
}

The Host configuration file will simply import the above template.

object Host "network-switch" {
  import "generic-host"
  import "int-ports-template"

  address = "x.x.x.x"
  groups = [ "network" ]
  vars.hostgroup = "Network"

  vars.snmp_v3 = true
  ...
}

The Service configuration file remains the same.

apply Service for (interface => config in host.vars.snmp_interfaces) {
  import "generic-service"

  display_name = "Network traffic on " + config.snmp_interface_label
  check_command = "snmp-interface"

  vars.snmp_interface_ifname = "true"
  vars.snmp_interface_noregexp = "true"
  vars.snmp_warn = "100,100"
  vars.snmp_crit = "100,100"
  vars += config

  assign where host.vars.snmp_address
}
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