Switchport Forbidden Vlan - Dell PowerConnect 3424 Cli Reference Manual

User Guidelines
There are no user guidelines for this command.
Example
The following example configures Ethernet port 1/e16 to discard untagged frames at ingress.
Console(config)# interface ethernet 1/e16
Console(config-if)# switchport general acceptable-frame-type
tagged-only

switchport forbidden vlan

The switchport forbidden vlan Interface Configuration mode command forbids adding specific
VLANs to a port. To return to the default configuration, use the remove parameter for this
command.
Syntax
switchport forbidden vlan {add vlan-list | remove vlan-list}
add vlan-list — Specifies the list of VLAN IDs to be added. Separate non-consecutive
•
VLAN IDs with a comma and no spaces. A hyphen designates a range of IDs.
• remove vlan-list — Specifies the list of VLAN IDs to be removed. Separate non-
consecutive VLAN IDs with a comma and no spaces. A hyphen designates a range of IDs.
Default Configuration
All VLANs are allowed.
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
• This command can be used to prevent GVRP from automatically making the specified
VLANs active on the selected ports.
Example
The following example forbids adding VLAN IDs 234 to 256 to Ethernet port 1/e16.
Console(config)# interface ethernet 1/e16
Console(config-if)# switchport forbidden vlan add 234-256
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VLAN Commands