Operation Manual – VLAN
H3C S3100 Series Ethernet Switches Chapter 1 VLAN Overview
1-5
1.1.5 VLAN Classification
Depending on how VLANs are established, VLANs fall into the following six categories.
z Port-based VLANs
z MAC address-based VLANs
z Protocol-based VLANs
z IP-subnet-based VLANs
z Policy-based VLANs
z Other types
At present, the S3100 series switches support the port-based and protocol-based
VLANs.
1.2 Port-Based VLAN
Port-based VLAN technology introduces the simplest way to classify VLANs. You can
assign the ports on the device to different VLANs. Thus packets received on a port will
be transmitted through the corresponding VLAN only, so as to isolate hosts to different
broadcast domains and divide them into different virtual workgroups.
Ports on Ethernet switches have the three link types: access, trunk, and hybrid. For the
three types of ports, the process of being added into a VLAN and the way of forwarding
packets are different.
Port-based VLANs are easy to implement and manage and applicable to hosts with
relatively fixed positions.
1.2.1 Link Types of Ethernet Ports
The 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 connected
to a user PC.
z Trunk: A trunk port can belong to more than one VLAN. It can forward packets for
multiple VLANs, and is generally connected to another switch.
z Hybrid: A hybrid port can belong to more than one VLAN to forward packets for
multiple 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 port
only allows the packets of the default VLAN to be sent untagged.
The three types of ports can coexist on the same device.
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