Nagios Support Forum

Hi Team,

We are trying to configure Netflow Analyzer, but during configuration showing error (Port 9996 is not unique) for second router.

You need to be sure to supply separate ports for each source, as the data will be pulled from that specific port and applied to it's source.

Netflow communicate on port 9996 and configured in nerwork device for NagiosXI IP.

We configuration same port for OpManager Netflow and its working properly.

Each Source in Network analyzer listens on 1 port. All data coming in on that port will be in the source you already added to 9996

This netflow configuration on router,

ip flow-export destination 10.21.0.20 9996
ip flow-export destination 10.21.0.10 9996

for all routers.

First IP for OpManager Netflow working ok for all routers

Second IP for NagiosXI working ok for only 1 router for second router showing error "9996 is not a unique port."

Yes, this is what we are trying to say. You need to assign a unique port to each source, and that same unique port to your flow senders on those systems/network devices.

At this point, it is not possible with nna to use a single port for multiple services. The only options you would have, would be to use iptables natting, to redirect 9996 for different IPs to different ports internal to NNA, or use a external firewall in front of NNA to do the same.

Now status, router configuration

ip flow-export destination 10.21.0.10 9996

facing same issue

Are you still sending data to NNA over port 9996 from your other router?

You mean to say configure different port for each router.

I have 1000 network device, then I have to assign 1000 different port to each network device ?