76 CHAPTER 4: VLAN OVERVIEW
Currently, the 3Com Switch 4210 Family adopts the IVL mode only. For more
information about the MAC address forwarding table, refer to
“MAC Address
Table Management” on page 131.
VLAN Classification Depending on how VLANs are established, VLANs fall into the following six
categories.
■ Port-based VLANs
■ MAC address-based VLANs
■ Protocol-based VLANs
■ IP-subnet-based VLANs
■ Policy-based VLANs
■ Other types
The Switch 4210 currently supports port-based VLANs.
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. For details, refer to
“Port Basic Configuration”
on page 95.
Port-based VLANs are easy to implement and manage and applicable to hosts with
relatively fixed positions.
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