NetFlow and sFlow Configuration Guide on Cisco 8000 Series Routers, Cisco IOS XR Releases

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NetFlow and sFlow Configuration Guide on Cisco 8000 Series Routers, Cisco IOS XR Releases

sFlow parameters and default values

Updated: June 9, 2026

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Lists the sFlow parameters and their default values for configuration on Cisco routers.

The following table lists the sFlow parameters and default values that you can use when configuring sFlow on the router:

Table 1. sFlow Parameters and Default Values
Parameter	Value	Command
Sampling rate	Default value: 1 out of 10000 packets	sampler-map
Sample header size	128 - 343 bytes (from Cisco IOS XR Release 7.3.4 onwards) 128 - 200 bytes (prior to Cisco IOS XR Release 7.3.4) Default value: 128 bytes	flow monitor-map
Counter poll interval	5-1800 seconds Default value: None	flow monitor-map
Collector port	Configurable. Default value: 6343	flow exporter-map

Table 2. Feature History Table
Feature Name	Release Information	Feature Description
Increased sFlow sample-header size	Release 7.3.4	You can now increase the sFlow sampling size to 343 bytes of the incoming or outgoing packet header. This enhancement lets the router export a larger sample to the flow-analyzer tool, enabling the tool to provide more accurate network analytics. In earlier releases, you could configure up to 200 bytes.

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