3Com 10014299 manual Fault 1 Fail to create virtual interface, Virtual-template-number

162CHAPTER 11: CONFIGURING LOGICAL INTERFACE

3Create corresponding relation between the virtual-template and related physical interface

In VPN application environment, it is necessary to build up corresponding relations between L2TP group and virtual-template. In MP application environment, it is necessary to build up corresponding relations between MP and virtual-template.

Please see chapters in Operation Manual – VPN and Operation Manual – Link Layer Protocol for detailed description.

Display and Debug The virtual interface, automatically created by the system if necessary, will work by Virtual-Template and using parameters of related virtual-template. So, it's unnecessary for manual

Virtual Interface configuration. The virtual interface will be deleted because of low-layer link disconnection or user intervention.

The following command can be used to display the state of virtual-template in all views.

Table 193 Display state of the specified virtual-template

Operation	Command
Display the state of the specified	display interfaces
virtual-template	virtual-template
	virtual-template-number

Troubleshooting Before checking and eliminating faults of virtual-template, first find out the virtual-template is used to create VPN virtual access interface or MP virtual interface, then locate the fault of the virtual-template in actual application environment.

Fault 1: Fail to create virtual interface.

Troubleshooting: the reasons may be as follows:

■The virtual-template is not configured with IP address. Therefore, PPP consultation fails and the virtual interface can't turn to Up state.

■The virtual-template is not configured with IP address (or IP address pool) allocated to the opposite end. If it is required to allocate addresses to the opposite end in actual application, the virtual interface cannot meet the requirement, nor turn to Up state.

■PPP authentication parameter is set incorrectly. If the opposite end is not the user defined by the router, PPP consultation will also fail.

Please see related chapters of Operation Manual – VPN and Operation Manual – Link Layer Protocol for more methods of fault diagnosis and troubleshooting of virtual-template.