VLAN Management
Regular VLANs
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4 237
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- Translated VLAN—Configure the S-VLAN that will replace the specified C-
VLAN.
• Tunnel Mapping—This option is displayed if you selected the Tunnel Mapping option
in the Mapping Type selection. Select one of the following:
- Customer VLAN—Select Default to define the required action for C-VLANs not
specifically specified or VLAN List to specifically define VLAN tunnel behavior
for listed VLANs.
- Tunneling—Select Drop or Outer VLAN ID. If Outer VLAN ID is selected, enter
the VLANs.
STEP 4 Click Apply. The parameters are written to the Running Configuration file.
Port to VLAN
The Port to VLAN and Port VLAN Membership pages display the VLAN memberships of
the ports in various presentations. You can use them to add or remove memberships to or 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 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 Generic VLAN Registration Protocol
(GVRP).
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.
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