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Admit Tagged Only—The interface accepts only tagged frames
•
Admit Untagged Only—The interface accepts only untagged and
•
priority frames
Ingress Filtering—(Available only in General mode) Select to enable ingress
•
filtering When an interface is ingress filtering enabled, the interface discards
all incoming frames that are classified as VLANs of which the interface is not
a member Ingress filtering can be disabled or enabled on general ports It is
always enabled on access ports and trunk ports
STEP 5 Click Apply The parameters are written to the Running
Configuration file
Join VLAN
When a port is forbidden default VLAN membership, that port is not allowed
membership in any other VLAN An internal VID of 4095 is assigned to the port
To forward packets properly, intermediate VLAN-aware devices that carry VLAN
traffic along the path between end nodes must be manually configured
Untagged port membership between two VLAN-aware devices with no
intervening VLAN-aware devices, must be to the same VLAN In other words,
the PVID on the ports between the two devices must be the same if the ports
are to send and receive untagged packets to and from the VLAN Otherwise,
traffic might leak from one VLAN to another
Frames that are VLAN-tagged can pass through other network devices that
are VLAN-aware or VLAN-unaware If a destination end node is VLAN-unaware,
but is to receive traffic from a VLAN, then the last VLAN-aware device (if there
is one), must send frames of the destination VLAN to the end node untagged
To add a port to a VLAN:
STEP 1 Click Configuration > VLAN Management > Interface Settings
STEP 2 Select an interface type (Port or LAG), and click Search Ports or LAGs
and their VLAN Membership are displayed
STEP 3 To add a Port or LAG to a VLAN, select it and click Join VLAN
STEP 4 Enter the following fields:
VLAN Mode—Select the interface mode for the VLAN The options are:
•
Access—The interface is an untagged member of a single VLAN A
•
port configured in this mode is known as an access port
Trunk—The interface is an untagged member of one VLAN at most,
•
and is a tagged member of zero or more VLANs A port configured in
this mode is known as a trunk port
General Port—The interface can support all functions as defined
•
in the IEEE 802 1q specification The interface can be a tagged or
untagged member of one or more VLANs
Tagging:
•
Forbidden—The interface is not allowed to join the VLAN even from
•
GVRP registration When a port is not a member of any other VLAN,
enabling this option on the port makes the port part of internal VLAN
4095 (a reserved VID)
Excluded—The interface is currently not a member of the VLAN
•
This is the default for all the ports and LAGs when the VLAN is newly
created
Tagged—The interface is a tagged member of the VLAN
•
Untagged—The interface is an untagged member of the VLAN
•
Frames of the VLAN are sent untagged to the interface VLAN
PVID—Port PVID is set to this VLAN If the interface is in access mode
•
or trunk mode, the device automatically makes the interface an
untagged member of the VLAN If the interface is in general mode,
you must manually configure VLAN membership
STEP 5 Click Apply The port is added to the VLAN and the settings are
written to the Running Configuration file
VLAN Memberships
The VLAN Memberships page displays the VLAN memberships of the ports in
various presentations You can use them to add memberships to or remove
memberships from the VLANs
When a port is forbidden default VLAN membership, that port is not allowed
membership in any other VLAN An internal VID of 4095 is assigned to the port
To forward packets properly, intermediate VLAN-aware devices that carry
VLAN traffic along the path between end nodes must be manually configured
Untagged port membership between two VLAN-aware devices with no
intervening VLAN-aware devices, must be to the same VLAN In other words,
the PVID on the ports between the two devices must be the same if the ports
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