I am using LMS 3.2 with Campus 5.2.1 and the topology map is showing one Ethernet1000M bus between
the WLC 4402 and the 3750 switch instead of a direct connection.
The cdp info on both the WLC and the switch shows each other.
See the topology map attached.
Besides this, there are two connections between the WLC and the Ethernet1000M bus.
Only one physical port on the WLC is connected but there is a trunk on this port.
On the switch the received IP address from the WLC cdp is the 172.22.2.16 (vlan 202).
On the WLC the received IP address from the switch cdp is 172.20.10.254 (vlan 10).