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Home > Success Center > Archive > 2017June05 - IPAM > SolarWinds Orion Core Components > Handling counter rollovers

Handling counter rollovers

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Created by Nanette.Neal, last modified by Nanette.Neal on Jul 20, 2016

Views: 8 Votes: 0 Revisions: 5

The Counter Rollover setting configures Orion IPAM to properly handle counter rollovers. Orion IPAM is capable of handling either 32 bit or 64 bit counters, but, by default, Orion IPAM assumes counters are 32 bit. 32 bit counters have a maximum value of 232, or 4,294,967,296, and 64-bit counters, if they are supported by your network devices, have a maximum value of 264, or 18,446,744,073,709,551,616.

Note: The 32 bit counters option is designated as Method 1 in the Counter Rollover field on the Orion Polling Settings page.

The following procedure designates the type of counter handling used by Orion IPAM.

To designate the type of counter handling used by Orion IPAM:

1. Log in to the web console as an administrator.

2. Click Settings in the top right of the web console.

3. Click Polling Settings in the Settings grouping of the Orion Website Administration page.

4. If you are using 64  bit counters, select Method 2 in the Counter Rollover field in the Calculations & Thresholds area.


  • If Method 2 is selected, Orion IPAM will intentionally skip a poll if a polled value is less than the previous polled value to permit counting to 264.
  • Orion fully supports the use of 64 bit counters; however, these 64 bit counters can exhibit erratic behavior in some implementations. If you notice peculiar results when using these counters, disable the use of 64-bit counters for the problem device and contact the device manufacturer.

5. If you are using of 32  bit counters, select Method 1 in the Counter Rollover field in the Calculations & Thresholds area.

Note: If Method 1 is selected, when a rollover is detected, the time between polls is calculated as (232 Last Polled Value) + Current Polled Value.

Last modified
11:28, 20 Jul 2016