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General rules to creating a tagged vlan – Allied Telesis AT-S25 User Manual

Page 149

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AT-S25 Version 1.4 User’s Guide

149

General Rules to

Creating a

Tagged VLAN

Below is a summary of the rules to observe when creating a tagged
VLAN.

❑ Each tagged VLAN must be assigned a unique VID. If a particular

VLAN spans multiple switches or stacks, each part of the VLAN on
the different switches or stacks must be assigned the same VID.

❑ An untagged port can be an untagged member of only one VLAN

at a time.

❑ A tagged port can be a member of multiple tagged VLANs.

❑ When creating a tagged VLAN in an AT-8300 stack, you create the

VLAN only once. You do not create the VLAN separately on each
switch in a stack. Once you have created a VLAN, you can assign it
ports from any or all of the switches in the stack.

❑ Each port must be assigned a PVID. This value must be the same

for all ports in a port-based VLAN and must match the VLAN’s VID.
This function is performed automatically by the AT-S25
management software.