How do I set a NetFlow sampling rate?

The sampling rate is indicated in a header field of NetFlow version 5 (same sampling rate for all interfaces) or in option records of NetFlow version 9 (sampling rate per interface). The sampling rate is configured on the device. Click here for our NetFlow sampling rate recommendations.

Please keep in mind that if you configure the sampling rate from your Auvik dashboard, it must also be configured on the device itself because the configuration on the device is what's used.

Some devices don’t allow you to specify a sampling rate. On these devices, you can enable simulated sampling and set the desired sampling rate. This way Auvik will selectively discard part of the flows received to simulate the output it would get if the device was applying sampling.

The following must be completed from the client dashboard.

• Configure sampling rate for a single device
  • TrafficInsights summary
  • Device dashboard
• Configure sampling rates for multiple devices

How to configure sampling rate for a single device

There are two locations that the sampling rate can be set for a single device.

TrafficInsights summary

1. Click TrafficInsights in the side navigation bar.
2. In the list of networks, find the one you want to edit. Check the box at the beginning of its row.
3. Click the Sampling Rate button.
4. Enter a sampling rate between 1 and 20,000.
5. Select Yes to apply the sampling rate.
6. Click Save.

Device dashboard

1. Click TrafficInsights in the side navigation bar.
2. Click the device name in the displayed list of devices.
3. Hover over the TrafficInsights button and click Set Up from the entity navigation.
4. Enter a sampling rate between 1 and 20,000.
5. Select Yes to apply the sampling rate.
6. Click Save.

How to configure sampling rate for multiple devices

1. Click TrafficInsights in the side navigation bar.
2. In the displayed list of devices, find the one(s) you want to edit. Check the box at the beginning of each row.
3. Click the Sampling Rate button.
4. Select edit from the Sampling rate dropbox and make your edits. Sampling rate must be between 1 and 20,000.
5. Select edit from the Apply as Simulated Sampling dropbox and make your changes.
6. Click Save.