574 Configuring VLANsTable 21-1 provides an overview of the types of VLANs you can use tologically divide the network.Switchport ModesYou can configure each port on a PowerConnect 7000 Series switch to be inone of the following modes:• Access — Access ports are intended to connect end-stations to the system,especially when the end-stations are incapable of generating VLAN tags.• Trunk — Trunk-mode ports are intended for Switch-to-Switch links, wherein general all traffic is tagged.• General — General ports can be either access or trunk ports.VLAN membership rules that apply to a port are based on the switchportmode configured for the port. Table 21-2 shows the behavior of the threeswitchport modes.Table 21-1. VLAN AssignmentVLAN Assignment DescriptionPort-based (Static) This is the most common way to assign hosts to VLANs.The port where the traffic enters the switch determines theVLAN membership.IP Subnet Hosts are assigned to a VLAN based on their IP address. Allhosts in the same subnet are members of the same VLAN.MAC-Based The MAC address of the device determines the VLANassignment. This type of VLAN is useful when a hostmight not always connect to the network through the sameport but needs to be on the same VLAN.Protocol Protocol-based VLANs were developed to separate trafficbased on the protocol type before IP traffic became the defacto standard in the LAN. Use a protocol-based VLAN onnetworks where you might have a group of hosts that useIPX or another legacy protocol. With protocol-basedVLANs, you can segregate traffic based on the EtherTypevalue in the frame.
