SNMP Monitoring: OID/MIB Monitoring, Traffic Monitoring

The program allows you to monitor OID and MIB values on switches via the SNMP protocol.

SNMP (Simple Network Management Protocol) – a widespread protocol, which functions include managing network devices and obtaining information on their performance in particular. As a rule, all modern manageable network devices (workstations, laptops, switches, printers, routers, modems, web cams, etc.) have the so-called Management Information Base (MIB). That base contains a lot of useful information on the state of the device: output counters, active processes, network traffic values on the interfaces, etc. In some devices, the total number of different records in such bases can reach tens of thousands. Each record in the base is accompanied by a unique identifier OID (object identifier). Having OID of the record storing the parameter of interest, you can configure the application to monitor it. The application will connect to the device over the SNMP protocol, then obtain the parameter value over OID and then compare it with the specified value. If the parameter value doesn't match the specified one, the application will alert of that.

More information on configuring SNMP and obtaining data from MIB can be read on these resources:

• Initially, the SNMP service that provides access to MIB, is neither installed nor configured on Windows-based workstations. To install the SNMP service, please follow the instructions provided here:
  http://technet.microsoft.com/en-us/library/cc759570(WS.10).aspx
• The configuration of the SNMP security properties is described here:
  http://technet.microsoft.com/en-us/library/cc783571(WS.10).aspx
• Description of MIB bases for Windows 2000/XP/2003/Vista/…
  http://support.microsoft.com/?scid=kb%3Ben-us%3B237295&x=13&y=8
• Brief list of useful OID for workstations under Windows 2000/XP/2003/Vista:
  .1.3.6.1.2.1.25.1.1.0 – time the host has been running for (SystemUptime)
  .1.3.6.1.2.1.25.3.3.1.2 – processor load (this is the initial OID; specific OID values for certain processes are to be looked for in the base directly; i.e. for the first processor the OID can be .1.3.6.1.2.1.25.3.3.1.2.3 , for the second one - .1.3.6.1.2.1.25.3.3.1.2.4)
  .1.3.6.1.2.1.25.1.6.0 – number of running processes
  .1.3.6.1.2.1.25.2.2.0 – total RAM size
  .1.3.6.1.2.1.25.2.3.1.6.(1,2,3 …) – free space on drives 1,2,3, etc. in blocks.
• You can also take a look here for more:
  https://secure.dd-wrt.com/wiki/index.php/Simple_Network_Management_Protocol#Known_OID.C2.B4s_via_SNMP