If a PPPoE Client Establishes an L2TP Tunnel with the Firewall Through Dial-up, Why Does the Firewall Display That the VT Interface Is Down When the PPPoE Client Logs Out?
After a user accesses the firewall through PPPoE dial-up, the firewall sets up a VA interface instance, such as Virtual-Template1:0 based on Virtual-Template. When the user logs out, the firewall deletes the instance. In this case, the system displays that the instance is Down. However, Virtual-Template is an interface template and must be always Up.