Patent ID: 7733883
Filing Date: 2010-06-08
Classification: H04L

Abstract:
1. A method for implementing a virtual leased line (VLL), comprising the steps of: configuring a virtual local area network (VLAN) label stack on the basis of VLAN QinQ; configuring a VLAN QinQ switching device and a multi-protocol label switching (MPLS) device to communicate with each other and implementing switching between VLAN labels and MPLS labels; extending a label distribution protocol (LDP) to support encapsulation of VLAN labels, so as to carry out VLAN label assignment and take the extended LDP as a topology discovery protocol for an L2 virtual private network; setting the range of VLAN labels; implementing a VLL by constructing a VLAN switching path; wherein the step of configuring the VLAN QinQ switching device and the MPLS device to communicate with each other further comprises the sub-steps of: if the VLAN QinQ switching device is at upstream, accomplishing conversion from VLAN QinQ encapsulation to MPLS encapsulation at an outgoing interface of the VLAN QinQ switching device; if the VLAN QinQ switching device is at downstream,