Allied Telesis AT-S41 - Manual (Page 94)

AT-S41 User’s Guide
94
A VLAN that contains only tagged frames or that contains a combination
of tagged and untagged ports is referred to as a tagged VLAN. And, as
explained previously, any device that you connect to a tagged port of a
tagged VLAN must be IEEE 802.1Q-compliant.
General Rules
to Creating a
VLAN
Below are general rules to observe when creating a VLAN.
❑ An AT-8350GB switch can support up to256 port-based and
tagged VLANS.
❑ Each VLAN must be assigned a unique VID. However, if a particular
VLAN spans multiples AT-8350GB stacks, each part of the VLAN on
the different stacks must be assigned the same VID.
❑ A port can be an untagged member of only one VLAN at a time.
❑ A port can be a tagged member of multiple VLANs.
❑ You must assign each untagged port a PVID. The PVID of an
untagged port must match the VLAN’s VID. You must assign this
value manually when you create the VLAN.
❑ A port-based VLAN that spans multiple stacks requires a port on
each stack where the VLAN is located to function as a connection
between the various parts of the VLAN reside.
❑ If there are end nodes in different VLANs that need to
communicate with each other, a router or Layer 3 switch is
required to connect the VLANs.