ZyXEL Communications ES-2048 - Manual (Page 45)

ES-2000 Series Switch Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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• 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