VLAN Commands 347switchport general acceptable-frame-type tagged-onlyThe switchport general acceptable-frame-type tagged-only Interface Configuration modecommand discards untagged frames at ingress. To enable untagged frames at ingress, use the noform of this command.Syntaxswitchport general acceptable-frame-type tagged-onlyno switchport general acceptable-frame-type tagged-onlyDefault ConfigurationAll frame types are accepted at ingress.Command ModeInterface Configuration (Ethernet, port-channel) modeUser Guidelines• There are no user guidelines for this command.ExampleThe following example configures g8 to discard untagged frames at ingress.switchport forbidden vlanThe switchport forbidden vlan Interface Configuration mode command forbids adding specificVLANs to a port. This may be used to prevent GVRP from automatically making these VLANsactive on the selected ports. To revert to allowing the addition of specific VLANs to the port, usethe remove parameter for this command.Syntaxswitchport forbidden vlan {add vlan-list | remove vlan-list}• add vlan-list—List of VLAN IDs to add to the "forbidden" list. Separate non consecutiveVLAN IDs with a comma and no spaces. A hyphen designates a range of IDs.• remove vlan-list—List of VLAN IDs to remove from the "forbidden" list. Separate nonconsecutive VLAN IDs with a comma and no spaces. A hyphen designates a range of IDs.Default ConfigurationAll VLANs allowed.Console (config)# interface ethernet g8Console (config-if)# switchport general acceptable-frame-typetagged-only
