Layer 2 Switching Commands 801ExampleThe following example displays the Protocol-Based VLAN information foreither the entire system.console#show port protocol allGroupGroup Name ID Protocol(s) VLAN Interface(s)--------------- ----- ---------- ---- ------------test 1 IP 1 gi1/0/1show switchport ethertypeUse the show switchport ethertype to display the configured Ethertype foreach interface.Syntaxshow switchport ethertype [ interface interface-id | all ]• interface-id—A physical interface or port channel.• all—All interfaces.Default ConfigurationThere is no default configuration for this command.Command ModePrivileged Exec mode and all Show modesUser GuidelinesUp to three additional TPIDs can be configured. The 802.1Q TPID is pre-configured in the system and may not be removed.It is not possible to configure an inner VLAN TPID value other than 0x8100.The primary TPID is shown in the EtherType column. The primary TPID isplaced in the outer tag for traffic egressing the interface. The interface willprocess traffic as double tagged if any of the configured TPIDs is present inthe frames outer VLAN tag. Traffic with a TPID other than the configuredTPID is processed normally, i.e. as if it is not double tagged.
