Content

| 2.3 |  | VLAN Types |
| 2.3.3 |  | Local VLANs |

The Local VLAN model has VLANs dedicated to each access layer switch cluster, with Layer 3 switching between wiring closets performed at the distribution layer or Main Distribution Facility (MDF). With the Campus-wide VLAN model, users that are in the same department would be in the same VLAN regardless of the location of the VLAN in the network. In the Local VLAN model, users in the same department are only in the same VLAN if their access layer switches are connected to the same distribution layer switch. If the access layer switch is connected to a different distribution layer switch, the users are assigned a different VLAN ID, and subnet address, regardless of the users' department.

> Note: If an access layer switch only has users that belong to a single VLAN, it is not necessary to configure those interfaces for the specific VLAN. However, some network administrators assign these interfaces to their proper VLAN in case the switch has other VLANs configured on it in the future.

Geographic VLANs are also considerably easier to manage and conceptualize than VLANs that span different geographic areas.