VLAN Configuration Examples
A VLAN is an administratively configured LAN segment that limits the traffic in multiple broadcast domains. Instead of physically reconnecting a device to a different LAN, network administrators can accomplish this task by configuring a VLAN compliant switch to create logical network segments.
Tagged VLAN allows switch segmentation to span across multiple managed switches. This type of VLAN is ideal for LANs that consist of various types of communication groups such as Office LANs, Controls Systems, and IP Cameras. When used properly, it will effectively isolate two or more groups from each other in a logical manner. This means that Broadcast, Multicast, and Unicast frames in one VLAN will not interfere with another isolated VLAN group.
Example 1 – Basic understanding of port-based VLANs
Receiving | Tagged VID | Destination | Transmitting | Notes |
Port # | in packet | Address | Port #s |
|
TX1 | Untagged | MAC on port TX2 | TX2 | Unicast Traffic |
TX1 | Untagged | Unknown MAC | TX2 | Floods VLAN 2 |
TX1 | VID 4 | MAC on port TX2 | Packet Discarded | |
TX3 | Untagged | MAC on port TX5 | TX5 | Unicast Traffic |
TX3 | Untagged | Unknown MAC | Floods VLAN 1 | |
TX3 | VID 4 | MAC on port TX6 | Packet Discarded |
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