I have three ESXi hosts (Host A, B & C) all connected to a centralized Dell switch in trunk mode. Each using vSwitches (not dvSwitches). They are all configured for VLAN ID: All (4095). This works great, I effectively have 1 network between all the hosts. One of the hosts has a pfSense gateway VM (Host A).
However, I would like to take 1 of the hosts (Host C), and additionally connect it using another NIC to an HP 5900AF-48G-4XG-2QSFP+ Switch, using VLAN 5 (because I need regular physical RJ45 access to the network). I configured a set of ports on the HP to VLAN 5. But I cannot seem to configure the port properly on the HP switch. Effectively my question is, for this type of HP switch, should the port be configured in trunk mode? I have it in Trunk mode on VLAN 5. However, if the ESXi host NIC is connected to the HP switch, it causes the VMs on that host (Host C) to not be able to talk to hosts (B & A) over the Dell switch.