This sample configuration is based on an HP ProCurve 29xx switch. Other models may have slight configuration variations.

Notes:

• If you're collecting flow from multiple devices sharing the same public IP, these instructions may vary. Contact Auvik support for assistance.
• These instructions assume:
• You have Telnet / SSH credentials and access to your HP switch.
• You have your enable password, if applicable.
• The switch is the only device exporting flow to AuvikFlow.
• The device has already been added to your AuvikFlow (Kentik) integration.

Access your switch’s CLI

• Telnet or SSH into your HP router.
• Enter configuration mode by typing “configure”. Enter your configuration password, if necessary.

Configure NetFlow

In this section, we’ll:

• Configure an sFlow destination.
• Configure sFlow sampling rate and apply to all ports.

Type the following in your switch: 
sFlow 1 destination 208.76.14.247 20013
sFlow 1 sampling all 1024
write memory

All done.

Source: http://www.inmon.com/pdf/AN-S7_InMon-traffic-sentinel-monitor-final-081808b.pdf