N-central Help

Traffic service

The Traffic service uses the Windows probe to monitor the amount of data transmitted to and from the full duplex network interfaces on a device. You can monitor upload and download speeds independently allowing for accurate reporting on network interfaces that have a download speed that is different from the upload speed.

  1. Configure SNMP on the device. For more information, see the manufacturer's documentation.
  2. Login to SolarWinds N-central.
  3. Click View > All Devices and click the name of a device.
  4. Click Settings > Properties and ensure the Use SNMP.
  5. Click Save if required.
  6. Click MonitoringStatus and click Add,
  7. Enter 1 for the number of instances of the Traffic service that you would like to associate to the device
  8. Click Apply.
  9. Click the Traffic service and click the Service Details tab.
  10. In Interfaces to Monitor, select the NICs/ports that you would like to monitor.
  11. Click OK.
Service Type SNMP
Instances on a Device 400
Device Class Server - Generic, Other, Printer, Scanner/Camera, Switch/Router, and Server - Windows
Monitored By Windows probe
Interfaces to Monitor Select the name or SNMP index of the NICs or ports that you would like to monitor.
Scan Interval 15 minutes
Upload Speed (MBits/sec) Enter the upload speed of the interface.
Download Speed (MBits/sec) Enter the download speed of the interface.

OIDs used by the Traffic service

Object Descriptors Numerical OID
sysUpTime 1.3.6.1.2.1.1.3
ifDescr 1.3.6.1.2.1.2.2.1.2
ifSpeed 1.3.6.1.2.1.2.2.1.5
ifInOctets 1.3.6.1.2.1.2.2.1.10
ifOutOctets 1.3.6.1.2.1.2.2.1.16

OID/Calculations

SolarWinds N-central services use Reverse Polish Notation (RPN) for all calculation formulae.

Metric Name OID/Calculation
Total Traffic Throughput ((^ifInOctets+ ^ifOutOctets)*8000)/^SysUpTime
Incoming Traffic Throughput (^ifInOctets*800)/(^sysUpTime)
Outgoing Traffic Throughput (^ifOutOctets*800)/(^sysUpTime)
Total Bandwidth Utilization ((^ifInOctets+ ^ifOutOctets)*8000)/(^SysUpTime*$downbitspersecspeed*1048576)
Outgoing Bandwidth Utilization (^ifOutOctets*8000)/(^SysUpTime*$downbitspersecspeed*1048576)
Incoming Bandwidth Utilization (^ifInOctets*8000)/(^SysUpTime*$downbitspersecspeed*1048576)
Incoming Traffic ^ifInOctets
Outgoing Traffic ^ifOutOctets
Total Traffic ^ifInOctets + ^ifOutOctets
Detected Port Speed ^ifSpeed