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Static Virtual LANs (VLANs)
802.1Q VLAN Tagging
Port AT-1 VLAN AT-2 VLAN Red VLAN Green VLAN Port AT-1 VLAN AT-2 VLAN Red VLAN Green VLAN
X1
Untagged
Tagged
X2
No*
X3
No*
Untagged Untagged
X4
No*
X5
No*
X6
Untagged
*"No" means the port is not a member of that VLAN. For example, port X3 is not a member of the Red VLAN and does
not carry Red VLAN traffic. Also, if GVRP were enabled (port-based only), "Auto" would appear instead of "No".
N o t e
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The VLANs assigned to ports X4 - X6, Y2 - Y5 can all be untagged because
■
there is only one VLAN assigned per port.
■
Port X1 has two AppleTalk VLANs assigned, which means that one VLAN
assigned to this port can be untagged and the other must be tagged.
Ports X2 and Y1 have two port-based VLANs assigned, so one can be
■
untagged and the other must be tagged on both ports.
Ports X3 and Y6 have two port-based VLANs and one protocol-based
■
VLAN assigned. Thus, one port-based VLAN assigned to this port can be
untagged and the other must be tagged. Also, since these two ports share
the same link, their VLAN configurations must match.
Switch X
No*
No*
No*
Untagged
Tagged
Tagged
No*
No*
Untagged
No*
Untagged
No*
No*
No*
No*
VLAN configurations on ports connected by the same link must match.
Because ports X2 and Y5 are opposite ends of the same point-to-point connec-
tion, both ports must have the same VLAN configuration; that is, both ports
configure the Red VLAN as "Untagged" and the Green VLAN as "Tagged".
Switch Y
Y1
No*
No*
Y2
No*
No*
Y3
No*
Untagged
Y4
No*
No*
Y5
No*
No*
Y6
No
Untagged
Untagged
Tagged
No*
Untagged
No*
No*
No*
Untagged
Untagged
No*
Untagged
Tagged
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Troubleshooting
