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2)
Port configuration and MAC address duplication should be synchronized on the switch. Port
configuration synchronization is completed in the whole configuration progress and MAC
address duplication is implemented while FDB is changing.
Port configuration synchronization: when configuring promiscuous and host ports for a
Private VLAN, the system will automatically add the promiscuous port and the host port
synchronously to the corresponding Primary VLAN and Secondary VLAN. Through port
configuration synchronization, the promiscuous port forwards the packets from the Primary
VLAN as well as from all the Primary VLAN-associated Secondary VLANs; the host port
forwards the packets from the Primary VLAN and the Secondary VLAN owning this host port.
Here we take a Private VLAN to illustrate port configuration synchronization. As shown in
the figure below, Port2, Port3 and Port5 belong to VLAN 2, VLAN 3 and VLAN 5
respectively. Configure VLAN 2 and VLAN 3 as Secondary VLANs, and VLAN5 as Primary
VLAN. After this configuration is completed, the settings of these ports are changed as
shown in Table 6-5.
Figure 6-16
Port PVID Allowed VLANs
Port5 5 VLAN5
Port2 2 VLAN2
Port3 3 VLAN3
Table 6-4 Port settings before configuration synchronization
Port PVID Allowed VLANs
Port5 5 VLAN2, 3, 5
Port2 2 VLAN2, 5
Port3 3 VLAN2, 5
Table 6-5 Port settings after configuration synchronization
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