FAQ: Network monitoring limits for a single On-Premise Poller in Site24x7
What is the maximum number of network devices and interfaces a single On-Premise Poller can monitor?
With the recommended system configuration and the standard polling interval (15 minutes), a single On-Premise Poller can support:
- 1,500 network devices
- 10,000 interfaces
- 10,000 performance counters
How many NetFlow interfaces can be monitored on a single On-Premise Poller?
If only network traffic monitoring is enabled (without network monitoring or the NCM tool enabled), a single On-Premise Poller can monitor up to 1,800 NetFlow interfaces, each handling close to 20,000 flows per second with a 10-minute polling interval.
Transmitting a large volume of data across all 1,800 interfaces can create performance overhead. To maintain optimal performance, it’s recommended that you limit NetFlow monitoring to around 1,000 interfaces. Additionally, if the average flow rate increases, consider further reducing the number of monitored interfaces to prevent system overload.
How does enabling network monitoring and NCM affect NetFlow monitoring capacity?
When both network monitoring and NCM are enabled:
- The NetFlow monitoring capacity is reduced to approximately 250 NetFlow interfaces, handling 20K–40K flows per second, with a 10-minute polling interval.
How many NCM devices can be monitored?
With a daily polling interval, a single On-Premise Poller can monitor up to 1,500 NCM devices alongside other network monitoring features.
Do these limits apply globally?
These limits apply per On-Premise Poller, based on the system specifications mentioned above. If you need to scale beyond these limits, consider:
- Deploying additional On-Premise Pollers
- Adjusting polling intervals to optimize resource usage
How can I estimate the monitoring capacity based on my custom setup?
You can use the Site24x7 On-Premise Poller Calculator to determine how many devices and interfaces your On-Premise Poller can support based on:
- Hardware specifications
- Types of monitoring enabled (network performance monitoring, NetFlow, NCM)
- Polling intervals
The flow rate will be considered fixed at 20,000 flows per second.
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