3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 4 Logical Interface Configuration3Com Corporation4-12II. Setting operating parameters of virtual-templateCompared with a regular physical interface, virtual-templates only support PPP interms of link layer protocol and IP and IPX in terms of network protocol. accordingly,you can perform the following tasks to set the following operating parameters:z Set PPP operating parametersz Assign an IP address to the virtual interfacez Set the IP address (or IP address pool) assigned to the PPP peerSetting these parameters on a virtual-template is the same as setting them on a regularinterface.III. Associating the virtual-template with the involved physical interfaceYou are required to associate an L2TP group with the virtual-template in a VPNenvironment and MP user with the virtual-template in an MP environment.For details, refer to V 2.41 Operation Manual - VPN.4.7.3 Displaying and Debugging Virtual-Template and Virtual InterfaceWhen needed, the system can automatically create a virtual interface and operate itwith the parameters of the associated virtual-template. Therefore, manual creation andconfiguration are not needed. A virtual interface can be deleted due to thedisconnection of the bottom layer link or the interruption of the user.Execute the following command in any view to display the state of a specifiedvirtual-template.Table 4-9 Display the state about the specified virtual-templateOperation CommandDisplay the state about the specifiedvirtual-templatedisplay interfaces virtual-templatenumberDisplay the state about the specified orall virtual access interfaces.display virtual-access { dialer[ number ] | vt [ vt-number ] | useruser-name | peer peer-address |va-number }*4.7.4 TroubleshootingBefore isolating the faults of a virtual-template, you must make sure the applicationenvironment, specifically, whether the virtual-template is used for creating a VPN virtualinterface or for creating an MP virtual interface.Fault 1: The system failed to create a virtual interface.Problem solving: Such a problem may arise because:
