Chapter 61 Switching
GS2220 Series User’s Guide
482
61.6.2.2 Po rt VLAN Trunking
Enable VLAN Trunking on a port to allow frames belonging to unknown VLAN groups to pass through
that port. This is useful if you want to set up VLAN groups on end devices without having to configure the
same VLAN groups on intermediary devices.
Refer to the following figure. Suppose you want to create VLAN groups 1 and 2 (V1 and V2) on devices
A and B. Without VLAN Trunking , you must configure VLAN groups 1 and 2 on all intermediary switches C,
D and E; otherwise they will drop frames with unknown VLAN group tags. However, with VLAN Trunking
enabled on ports in each intermediary switch you only need to create VLAN groups in the end devices
(A and B). C, D and E automatically allow frames with VLAN group tags 1 and 2 (VLAN groups that are
unknown to those switches) to pass through their VLAN trunking ports.
Fig ure 363 Port VLAN Trunking
61.7 VLAN Sta tus
Use this screen to view and search all static VLAN groups. Click Switc hing > VLAN from the navigation
panel to display the VLAN Sta tus screen as shown next.
VLAN Tag Control Tagged Ports belonging to the specified VLAN tag all outgoing frames
transmitted.
Untagged Ports belonging to the specified VLAN do not tag all outgoing
frames transmitted.
VLAN Port Port VID This is the VLAN ID assigned to untagged frames that this port
received.
Acceptable Frame
Type
You may choose to accept both tagged and untagged incoming
frames, just tagged incoming frames or just untagged incoming
frames on a port.
Ingress filtering If set, the Switch discards incoming frames for VLANs that do not
have this port as a member.
Table 251 IEEE 802.1Q VLAN Terminology (continued)
VLAN PARAMETER TERM DESCRIPTIO N
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