Hi there,
I enabled traffic-flow on two of my border BGP routers, running RouterOS 3.25 and 4.1. It have set it up to send data as Netflow version 5, but the data I receive is useless. All netflow packets contain information about packets from source address 0.0.0.0 to destination address 0.0.0.0, in fact all fields in the netflow payload is set to 0.

Is this a known bug, or am I doing something wrong?

is connection-tracking on or off? I wonder if its related to that.

It's off, and it's going to stay off, since there is no way I can be certain that the traffic is symmetrical...

yep, im in the same situation. Im guessing traffic-flow probably requires connection-tracking. Another item to add to the wiki for connection-tracking : )

Have you tested that?

I just tested it myself with another router running 3.27. I get my netflow data correct from that one. I'll do some more testing and see at what version it breaks.

Hmm, this is indeed weird. I cannot reproduce this bug with any other system other than my BGP border routers, so my guess is that this issue cannot be solved easily here on the forum, so I'm contacting support with a sup-out.

I have added NetFlow Target on my BGP router (NF was enabled already) - and have seen zeroed flows, then all became normal, and I can't repeat it now... v3.27...