ZyXEL Communications GS1920-48HPv2, Руководство пользователя

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Chapter 9 VLAN
GS1920v2 Series User’s Guide
109
Please refer to the following table for common IEEE 802.1Q VLAN terminology.
9.1.2.2 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 a port(s) 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 port(s).
Fig ure 83
Port VLAN Trunking
9.1.2.3 Se le c t the VLAN Type
Select a VLAN type in the
Ba sic Se tting
>
Switc h Se tup
screen.
Table 34 IEEE 802.1Q VLAN Terminology
VLAN PARAMETER TERM DESC RIPTIO N
VLAN Type Permanent VLAN This is a static VLAN created manually.
Dynamic VLAN This is a VLAN configured by a GVRP registration/deregistration
process.
VLAN Administrative
Control Registration Fixed Fixed registration ports are permanent VLAN members.
Registration
Forbidden Ports with registration forbidden are forbidden to join the specified
VLAN.
Normal Registration Ports dynamically join a VLAN using GVRP.
VLAN Tag Control Tagged Ports belonging to the specified VLAN tag all outgoing frames
transmitted.
Untagged Ports belonging to the specified VLAN don't 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