SNMP monitoring can give you a realtime visualize all the device connected to a network, different subnets, etc, and show the flow of data for each network device.
There's also The Dude - although it's a Windows-only application. But the visualisation is great.
Can it discover non Mikrotik devices?
The version I had played around with about 10 years ago could.
I've used about 10 years ago too, but I've heard that now it needs a Mikrotik device but I've nver had the time to test it
also zabbix
ntopng has all of that. I'm currently hosting it on my home router.
The closest project to this that I can think of would be Netbox
Netbox is a documentation tool. You can plug in Napalm to do some stuff but it mostly exists to catalog the intended state of the network.
It's a wonderfully powerful tool, and Stretch has done a great job with it...but it's not an analysis tool, it's documentation.
Stretch is a pretty cool guy too. He strikes me as the kind of person that really wants to help colleagues "see the light" of the role Python and FOSS can play in network automation and maintenance. I respect that, a lot...finding enjoyment in the way you do things, and wanting to share that with other people.
This really depends on your network hardware. At a minimum it'll need to support snmp and you can build something in zabbix, or preferably it'll support netflow.
My UDM router does all of that.
What are wanting to see and for what purpose?
I'll probably get boo'd but NetData covers just about everything I could want to monitor, and then some. If you don't want to hook up to the mother ship, you can use the /v3 switch in the url on your homarr dash, or equal like:
https://netdata.mycoolserver.duckdns.org/v3
Also, as has been mentioned, ntopng is pretty awesome as well.
Can't you just use Kali for that?
Depending on how you intend to use Kali, that's either a bad idea or a terrible idea. Don't use Kali bo for long running processes.
Just get a router with that feature or flash a firmware with that feature.
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