Network Statistics

The Network Statistics monitor uses Simple Network Management Protocol (SNMP) to query a device to collect data on three device protocols, Internet Protocol (IP), Transmission Control Protocol (TCP), and User Datagram Protocol (UDP) and alerts you when configured thresholds are met or exceeded by determining the rate-of-change for an OID, or the difference between the current poll value and the last poll value for an OID. With the exception of the tcpCurrEstab threshold, all thresholds used in the Network Statistics Monitor are rate-of-change monitors.

Provide a unique name and description for the monitor, then configure the following:

Thresholds to monitor. Select the IP, TCP, and/or UDP thresholds to monitor. Click on any individual threshold to highlight it, then click Configure to specify Down conditions for the selected threshold. The OID and a description of the selected parameter can be found at the bottom of the configuration dialog. Please note, conditions for only one threshold may be configured at a time.

Tip: When configuring a threshold, it is helpful to copy the OID from the parameter description listed on this dialog after you select a parameter. Paste this OID into the Object ID box in the SNMP MIB Walker (ANALYZE > Tools > SNMP MIB Walker), then click Walk. After the walk scan is complete, note the value listed. Perform several more walk scans, noting the value after each scan completes. These values illustrate how much this particular value may change over the course of several queries. Use these values as guidelines when configuring a threshold for the Network Statistics Monitor. You can also use the monitor Test function as an alternative to the SNMP MIB walker.