Netgear XCM8806 Chassis User Manual - Page 254
Private VLAN Switch Components,
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NETGEAR 8800 User Manual Private VLAN Tag 10 To main core rotuer Network LVAN VLAN1 Non-Isolated subscriber AVNL Marketnig Non-Isolated subscriber AVNL Engineering Isolated subscrbierVLAN Guests Tag 102 Tag 101 Figure 13. Private VLAN Switch Components Tag 50 EX_vlan_0201 There is one network VLAN in each PVLAN. Ports within a network VLAN, called network ports, can communicate with all VLAN ports in the PVLAN. Network devices that connect to the network VLAN ports are considered to be on the network side of the switch. The network VLAN aggregates the uplink traffic from the other VLANS, called subscriber VLANs, for egress communications on a network VLAN port. A network port can serve only one PVLAN, but it can serve one or more subscriber VLANs. Ingress communications on the network VLAN port are distributed to the appropriate subscriber VLANs for distribution to the appropriate ports. Devices that connect to subscriber VLAN ports are considered to be on the subscriber side of the switch. Tag translation within the PVLAN is managed at the egress ports. To enable tag translation for uplink traffic from the subscriber VLANs, you must enable tag translation on the appropriate network VLAN port. Tag translation is automatically enabled on subscriber VLAN egress ports when the subscriber VLAN is created and the port is added to the VLAN as tagged. Egress traffic from a subscriber VLAN is always tagged with the subscriber VLAN tag when the port is configured as tagged. A non-isolated subscriber VLAN is basically a standard VLAN that can participate in tag translation through the network VLAN when VLAN translation is enabled on the network VLAN port. You can choose to not translate tags on a network VLAN port, but this is generally used only for extending a PVLAN to another switch. A non-isolated subscriber VLAN that does not use tag translation is functionally equivalent to a regular VLAN, so it is better to create non-isolated VLANs only when you plan to use tag translation. Ports in a non-isolated VLAN can communicate with other ports in the same VLAN, ports in the network VLAN, and destinations on the network side of the switch. As with standard VLANs, non-isolated ports cannot communicate through Layer 2 with ports in other subscriber VLANs. In Figure 12, the Engineering and Marketing VLANs are configured as non-isolated subscriber VLANs, which means that they act just like traditional VLANs, and they can participate in tag translation when VLAN translation is enabled on a network VLAN port that leads to network side location. 254 | Chapter 9. VLANs
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