Logical systems: Interconnect logical system flow enhancement

The interconnect logical system routing and scaling are supported. You can interconnect multiple logical systems and multiple VPLS switches to pass the traffic without exiting the device. The logical tunnel interface point-to-point connection encapsulation frame-relay, encapsulation ethernet is introduced to optimize the obtainability of logical systems. The frame relay encapsulation adds data-link connection identifier (DLCI) information to the given frame.