Patent ID: 8416787
Filing Date: 2013-04-09
Classification: H04L

Abstract:
1. A method for implementing a layer-2 virtual private network (L2VPN) between autonomous systems, the method comprising: receiving, by a first Autonomous System Boundary Router (ASBR) of a first autonomous system (AS), a first L2VPN mapping packet; parsing, by the first ASBR, the first L2VPN mapping packet to obtain a first label carried in the first L2VPN mapping packet, applying, by the first ASBR, for a second label which is different from the first label carried in the first L2VPN mapping packet, generating, by the first ASBR, a second L2VPN mapping packet according to the second label; sending, by the first ASBR, the second L2VPN mapping packet to a second ASBR of a second AS; and recording, by the first ASBR, label switching information; wherein the first ASBR and the second ASBR belong to different service providers; wherein receiving the first L2VPN mapping packet comprises receiving the first L2VPN mapping packet sent by the second ASBR; and wherein, sending the second L2VPN mapping packet to the second ASBR comprises: wherein for a point-to-point virtual private network (VPN) scenario, building the L2VPN according to the information of the second label, the VC identifier and the type carried in the second L2VPN mapping packet, comprises: