Managing VLANs
Viewing VLAN Membership
Cisco 220 Series Smart Switches Administration Guide Release 1.1.0.x 138
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Viewing VLAN Membership
The Port VLAN Membership page displays a list of VLANs to which each port
belongs.
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 the packets properly, intermediate VLAN-aware devices that carry
VLAN traffic along the path between end nodes must either be manually
configured or must dynamically learn the VLANs and their port memberships from
GVRP.
Untagged port membership between two VLAN-aware devices with no
intervening VLAN-aware devices, should 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 view VLAN membership:
STEP 1 Click VLAN Management > Port VLAN Membership.
STEP 2 Select the interface type (Port or LAG), and click Go.
The following fields are displayed:
• Interface—Port or LAG ID.
• Mode—Interface VLAN mode that was selected on the Interface Settings
page.
• Administrative VLANs— Displays all VLANs of which the interface might be
a member.
• Operational VLANs—Displays all VLANs of which the interface is currently
a member.
• LAG—If the interface selected is Port, displays the LAG in which it is a
member.
STEP 3 Select a port, and click Join VLAN.
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