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sFlow Dynamic Polling and Adaptive Sampling Interval Overview

sFlow Dynamic Polling and Adaptive Sampling Interval enhances efficiency by auto-adjusting polling intervals (12s default to 24s) based on active interfaces, preventing buffer overflows.

The sFlow technology enhances network efficiency by dynamically adjusting polling intervals based on the number of sFlow enabled interfaces. This approach optimizes resource utilization and prevents buffer overflows and scheduler slips by increasing the polling interval from the default 12 seconds to 24 seconds when more than 100 interfaces are active, and reverting to 12 seconds when the count falls below 80. You can also manually configure polling intervals, disable adaptive sampling, or set fixed intervals to ensure consistent polling regardless of changes in the number of active interfaces.

The enhanced show sflow command provides detailed insight into configuration status (adaptive-sampling status and adaptive interval information), supporting troubleshooting and system optimization.

Benefits of sFlow Dynamic Polling and Adaptive Sampling Interval

  • Enhances resource management by dynamically adjusting polling intervals, reducing buffer overflows and scheduler slips.
  • Improves system performance with polling adaptation based on active interface count, ensuring efficient data collection.
  • Provides flexibility to manually configure polling intervals to balance system load and data accuracy.
  • Facilitates troubleshooting and optimization through improved visibility via the updated show sflow command outputs.

Configuration

These commands enable precise control of sFlow adaptive sampling interval to optimize network performance.

  • To set a fixed polling interval and override dynamic adjustment, configure the adaptive-interval interval value option at [set protocols sflow scale-mode] hierarchy level.

  • To disable adaptive sampling for consistent polling behavior, configure the no-adaptive-sampling option at [set protocols sflow scale-mode adaptive-interval] hierarchy level.

  • To disable dynamic polling interval adjustments, configure the disable option at [set protocols sflow scale-mode] hierarchy level.