SMC Networks VDSL2 manual Making Vlan Connections

NETWORK PLANNING

can be used for small networks attached to a single switch. However, tagged VLANs should be used for larger networks, and all the VLANs assigned to the inter-switch links.

This switch also has a Private VLAN feature. This allows modification of the default VLAN to provide port-based security and isolation between ports within the VLAN. Data traffic on these ports can only be forwarded to, and from, the uplink port. Private VLANs and normal VLANs can exist simultaneously within the same switch.

In the figure below, ports 1-5 are connected to four end users and a server in a normal VLAN configuration. The remaining ports are configured into a private VLAN.

Ports 6-12 in a Private VLAN

Ports 1-5 in VLAN 2

Phone Lines to Central Office

Central Office (PSTN)

VDSL Switch

Fiber Optic Link to ISP

ISP

(Internet)

Figure 2-3 Making VLAN Connections

Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use untagged ports.

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