PRTG sflow screenshot

March 8, 2016 - David Sokolik

How to configure sFlow on HP 25xx and 29xx switches

In this quick post I will go over the steps required to configure sFlow on HP 25xx and 29xx switches (Procurve/Aruba)

If you have the need to get full visibility of your network and you are wondering on how to accomplish this. I highly recommend on installing PRTG and using the sFlow sensor to geather data from your network devices.

 

Now while PRTG can gather data using SNMP and RMON (as well as via many other senors, PRTG is pretty awesome) on the free version you are limited to just 100 sensors now while you may think that 100 sensors is a lot considering that each SNMP / RMON sensor is per port on your switch its enough to have two 48 port switches to be out of senors.

This is where sFlow comes into play, the sFlow sensor allows you to see information of your entire device in one sensor.

PRTG sflow screenshot

PRTG sflow screenshot

In order to configure sFlow on your HP switch you must first have a hardset destination to where the switch will send the information too, so it is best to have a dedicated PRTG machine on your network.

The first thing you will do is access the switch console either via the console cable or ssh into its management IP.

Note: that in order to have sFlow working you must first set management IP on your switch on the default vLAN (vlan id 1)

to set the ip via the console run the following commands:

config

vlan 1 ip address YOUR_IP_/_SUBNET (for example: ‘vlan 1 ip address 192.168.1.10/24‘) this will set the management ip to 192.168.1.10 with subnet mask of 255.255.255.0

save configuration by issuing the ‘write memory‘ command

sFlow configuration, in the console run:

config

sflow 1 destination  _YOUR_PRTG/SFLOW_SENSOR_IP SFLOW_PORT (for example: ‘sflow 1 destination 192.168.1.100 6343‘)

sflow 1 sampling all 50 (this will invoke a sample on all the switch ports every 50 packets, you can also specify a static port to sample using: ‘sflow 1 sampling 47 50‘, this will sample port 47)

sflow 1 polling all 20 (this will invoke a polling of our samples every 20 seconds, again you can set the polling to be on a specific port by using: ‘sflow 1 polling 47 20‘ this will pool from port 47 every 20 seconds)

write memory‘ (save the current configuration)

sflow setup on HP 2530 switch

sflow setup

 

 

Applications and Security 2530 / 2920 / Aruba by HP / Aruba by HPE / HP / HPE / Procurve /

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