Network Topology - incorrect connection

I have a problem with correctly generating the network topology.

My network has a tree topolgy. Therefore, I am trying to generate parent/child relatioship.
I choose from the toolbar: Setup → Hosts → Main directory → Bulding , and then I choose from top menu: Host → Detect network parent hosts .

After this, I have not correct parent/child relationship. Additionally, I have a warning with error.

This is part of correct topology:

I use SNMP, but all switches has an active SNMP and CDP.

How can I solve this problem?

the parent scan detects default gateways. If this isn’t working for you, you can setup your relations manual via the Parent field in folder or host properties.


Does SNMP have to be enabled on the default gateway?