528 CHAPTER 28: L OGICAL INTERFACE CONFIGURATIONn ■ By default, no VLAN is associated to sub-interfaces created by using theinterface command.■ IP parameters and IPX parameters can be configured on Ethernetsub-interfaces. Refer to the “IP Addressing Configuration” on page 623 and“IPX Configuration” on page 2217 for detailed configurations.c CAUTION: In terms of VLANs■ An Ethernet sub-interface cannot send and receive packets properly before theVLAN associated with the Ethernet sub-interface is activated.■ The VLAN associated with the Ethernet sub-interface of the local device mustbe the same as the VLAN associated with the Ethernet sub-interface of thepeer device. Otherwise, packets cannot be transmitted properly.Display and maintain Ethernet sub-interfacesAfter the above configuration, you can use the display command in any view toview the configuration information of the Ethernet sub-interface, so as to verifythe configuration.You can use the reset command in user view to clear the statistics on the VLANassociated with the specified sub-interface.n For more information about the display vlan interface command and the resetcommand, refer to the display vlan command in “Introduction to VLAN” on page487.Configuring a WANSub-interfacesConfigure sub-interfaces for a WAN interface with link-layer protocolbeing frame relay1 Create a sub-interfaceCreate an Ethernetsub-interface and enter theEthernet sub-interface viewinterface ethernetinterface-number.subnumberRequiredIf the specified Ethernetsub-interface does not exist,this command first creates thesub-interface and then entersthe sub-interface view.Table 23 Configure an Ethernet sub-interfacesOperation Command DescriptionTable 24 Display and maintain Ethernet sub-interfacesOperation CommandDisplay the information about a sub-interface display interface interface-typeinterface-number.subnumberDisplay the information about the VLAN of asub-interfacedisplay vlan interface interface-typeinterface-number.subnumberTable 25 Create a sub-interfaceOperation Command DescriptionEnter system view system-view -
