ZyXEL Communications ES-2108 User Manual

ES-2108 Series User’s Guide

Chapter 8 VLAN

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Figure 38   Port Based VLAN Setup (Port Isolation) 

The following table describes the labels in this screen. 

Table 17   Port Based VLAN Setup 

Setting Wizard

Choose All connected or Port isolation.
All connected means all ports can communicate with each other, that is, there are no 

virtual LANs. All incoming and outgoing ports are selected. This option is the most 

flexible but also the least secure.
Port isolation means that each port can only communicate with the CPU 

management port and cannot communicate with each other. All incoming ports are 

selected while only the CPU outgoing port is selected. This option is the most limiting 

but also the most secure.
After you make your selection, click Apply (top right of screen) to display the screens 

as mentioned above. You can still customize these settings by adding/deleting 

incoming or outgoing ports, but you must also click Apply at the bottom of the screen.

Incoming

These are the ingress ports; an ingress port is an incoming port, that is, a port through 

which a data packet enters. If you wish to allow two subscriber ports to talk to each 

other, you must define the ingress port for both ports. The numbers in the top row 

denote the incoming port for the corresponding port listed on the left (its outgoing 

port). CPU refers to the switch management port. By default it forms a VLAN with all 

Ethernet ports. If it does not form a VLAN with a particular port then the switch cannot 

be managed from that port.

Outgoing

These are the egress ports; an egress port is an outgoing port, that is, a port through 

which a data packet leaves. If you wish to allow two subscriber ports to talk to each 

other, you must define the egress port for both ports. CPU refers to the switch 

management port. By default it forms a VLAN with all Ethernet ports. If it does not 

form a VLAN with a particular port then the switch cannot be managed from that port.