N o t e – IronPort Systems 4108GL User Manual
Page 332
14-26
Port-Based Virtual LANs (VLANs) and GVRP
Port-Based Virtual LANs (Static VLANs)
Po
rt
-Ba
sed V
ir
tual
LANs
(VLAN
s) a
n
d
G
V
RP
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.
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”.
Red VLAN: Untagged
Red VLAN: Untagged
Red VLAN: Untagged
Green VLAN: Tagged
Green VLAN: Tagged
Green VLAN: Tagged
Green VLAN only
Server
S1
Server
S2
Server
S3
Green
VLAN
Green
VLAN
Red
VLAN
Red
VLAN
Switch
"X"
X1
X2
X3
X4
Switch
"Y"
Y1
Y4
Y2
Y5
Y3
Switch X
Switch Y
Port
Red VLAN
Green VLAN
Port
Red VLAN
Green VLAN
X1
Untagged
Tagged
Y1
Untagged
Tagged
X2
Untagged
Tagged
Y2
No*
Untagged
X3
No*
Untagged
Y3
No*
Untagged
X4
Untagged
No*
Y4
Untagged
No*
Y5
Untagged
Tagged
*”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”.