ZyXEL ES-2024A User Manual download pdf (Page 45)

ES-2000 Series Switch Support Notes

• Forbidden registration: This port is forbidden to be the egress

port of specified VID..

• Fixed registration: While ad control is fixed registration, it means

this is a static registration entry. This port is the egress port of the

specified VID (a member port of the specified VLAN). The frames

with specified VID tag can go through this port.

• Normal registration: While ad control is normal registration, it

means this is a dynamic registration entry. The forwarding

decision is depended on Dynamic VLAN table.

4. Egress tag Control: This information is used for Egress Process. The

value may be tagged or untagged. If the value is tagged, the outgoing

frame on the egress port is tagged. If the value is untagged, the tag will be

removed before frame leaves the egress port.

VID Port Ad Control Tag Control

10 1 Forbidden Tag

10 2 Fixed Tag

10 3 Normal UnTag

20 1 Fixed Tag

20 5 Fixed UnTag

Filtering Database

VID Egress Port

10 1

10 2

20 3

Dynamic VLAN (DVLAN) table

3. Egress Process:

The Egress Process decides if the outgoing frames but be sent tagged or

untagged. The Egress Process refers to the egress tag control information in

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ZyXEL ES-2024A User Manual Page 45