HP 4108GL Management And Configuration Manual page 332

Port-Based Virtual LANs (VLANs) and GVRP
Port-Based Virtual LANs (Static VLANs)
Figure 14-19. Example of Networked 802.1Q-Compliant Devices with Multiple
VLANs on Some Ports
The VLANs assigned to ports X3, X4, Y2, Y3, and Y4 can all be untagged
because there is only one VLAN assigned per port. Port X1 has multiple VLANs
assigned, which means that one VLAN assigned to this port can be untagged
and any others must be tagged. The same applies to ports X2, Y1, and Y5.
Switch X
Port
X1
X2
X3
X4
*"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, "Auto" would appear instead of "No".
N o t e
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".
14-26
Server
S1
Red VLAN: Untagged
Green VLAN: Tagged
Red VLAN: Untagged
X1
Green VLAN: Tagged
Switch
X2
"X"
X4 X3
Red Green
VLAN VLAN
Red VLAN Green VLAN
Untagged Tagged
Untagged Tagged
No* Untagged
Untagged No*
Server
S2
Red VLAN: Untagged
Green VLAN: Tagged
Y1
Green VLAN only
Switch
Y5 Y2
"Y"
Y4 Y3
Red Green
VLAN VLAN
Switch Y
Port Red VLAN Green VLAN
Y1 Untagged Tagged
Y2 No* Untagged
Y3 No* Untagged
Y4 Untagged No*
Y5 Untagged Tagged
Server
S3