Allied Telesis AT-S86 - Manual (Page 68)

Chapter 7: VLANs
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match one of the Group IDs assigned to the port, the packet is discarded.
Port VLAN
Identifier
When an untagged packet is received on a port in a tagged VLAN, it is
assigned to one of the VLANs of which that port is a member. The
deciding factor in this process is the Port VLAN Identifier (PVID). Both
tagged and untagged ports in a tagged VLAN must have a PVID assigned
to them. The default value of the PVID for each port is 1. The switch
associates a received untagged packet to the Group ID that matches the
PVID assigned to the port. As a result, the packet is only forwarded to
those ports that are members of that VLAN.
General Rules for
Creating a
Tagged VLAN
Below is a summary of the rules to observe when you create a tagged
VLAN.
ˆ Each tagged VLAN must be assigned a unique VID. If a particular
VLAN spans multiple switches, each part of the VLAN on the different
switches must be assigned the same VID.
ˆ A tagged port can be a member of multiple VLANs.
ˆ An AT-FS750/48 Fast Ethernet switch can support up to 52 tagged
VLANS.