3Com 3CRUS2475 - Switchport Forbidden Vlan

464 CHAPTER 33: VLAN COMMANDS
Syntax
switchport general acceptable-frame-type tagged-only
no switchport general acceptable-frame-type tagged-only
Default Configuration
All frame types are accepted at ingress.
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
There are no user guidelines for this command.
Example
The following example configures Ethernet port 1 to discard untagged
frames at ingress.
switchport
forbidden vlan
The switchport forbidden vlan Interface Configuration mode
command forbids adding specific VLANs to a port. To restore the default
configuration, use the remove parameter for this command.
Syntax
switchport forbidden vlan {add vlan-list | remove vlan-list}
Parameters
■ add vlan-list — Specifies the list of VLAN IDs to be added. Separate
nonconsecutive 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 nonconsecutive VLAN IDs with a comma and no spaces. A
hyphen designates a range of IDs.
Default Configuration
Console(config)# interface ethernet 1
Console(config-if)# switchport mode general
Console(config-if)# switchport general acceptable-frame-type
tagged-only