Zhone zNID-GPON-2402 Configuration Manual page 149

VLAN
Edit Selected VLAN
Once a VLAN is created, you cannot change the name or VLAN ID, interface
type and whether secure forwarding is applied to the VLAN. You can define
port membership for an existing VLAN.
Figure 113: Selecting a VLAN for editing
Figure 114: Editing port membership for an existing VLAN
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zNID 24xx Series Configuration Guide