VLAN trunking

When traffic from different VLANs is passed along a single trunk link between switches, this is represented in the Network Manager containment model.

The following figure shows how the containment model represents this traffic.

Figure 1. Logical sub-interfaces contained within a trunk port  
Concept diagram that shows an example of logical sub-interfaces that are contained in a trunk port

If a port is being used for a trunk link, it contains logical sub-interfaces. The following information describes the properties of the ports and sub-interfaces shown in Figure 1:

  •  1  A sub-interface connecting VLAN 2 on the switch to VLAN 2 on another switch. Sub-interfaces are contained by trunk ports.
  •  2  A sub-interface connecting VLAN 3 on the switch to VLAN 3 on another switch. Sub-interfaces have no upward connections to their containing trunk port.
  •  3  A normal port.
  •  4  A port containing sub-interfaces.