Operation Manual – VLANH3C S3100 Series Ethernet Switches Chapter 1 VLAN Overview1-51.1.5 VLAN ClassificationDepending on how VLANs are established, VLANs fall into the following six categories.z Port-based VLANsz MAC address-based VLANsz Protocol-based VLANsz IP-subnet-based VLANsz Policy-based VLANsz Other typesAt present, the S3100 series switches support the port-based and protocol-basedVLANs.1.2 Port-Based VLANPort-based VLAN technology introduces the simplest way to classify VLANs. You canassign the ports on the device to different VLANs. Thus packets received on a port willbe transmitted through the corresponding VLAN only, so as to isolate hosts to differentbroadcast domains and divide them into different virtual workgroups.Ports on Ethernet switches have the three link types: access, trunk, and hybrid. For thethree types of ports, the process of being added into a VLAN and the way of forwardingpackets are different.Port-based VLANs are easy to implement and manage and applicable to hosts withrelatively fixed positions.1.2.1 Link Types of Ethernet PortsThe link type of an Ethernet port on the S3100 series can be one of the following:z Access: An access port can belong to only one VLAN, and is generally connectedto a user PC.z Trunk: A trunk port can belong to more than one VLAN. It can forward packets formultiple VLANs, and is generally connected to another switch.z Hybrid: A hybrid port can belong to more than one VLAN to forward packets formultiple VLANs. It can be connected to either a switch or a user PC.Note:A hybrid port allows the packets of multiple VLANs to be sent untagged, but a trunk portonly allows the packets of the default VLAN to be sent untagged.The three types of ports can coexist on the same device.
