The invention discloses a
virtual network (VN)
access method and
system. The method comprises the following steps: BN-NVE accepts access of VN in a
data center by a wide-band subscriber terminal and generates a forwarding table of the VN and corresponding table items; the BN-NVE is in forwarding
table information interaction with the NVE (
Network Virtualization Edge) of the accessed VN to form the information synchronization of the VN forwarding table; looking up the VN forwarding table by the BN-NVE according to the destination address of the
massage of the wide-band subscriber terminal, transmitting the message to a destination NVE in the VN after the
massage is encapsulated through a tunnel, and then transmitting the message to a destination VM through the destination NVE, so that the NV access of the wide-band subscriber terminal is completed. Another method comprises the following steps: a VN
business development and management entity in the
data center accepts an access request of the wide-band subscriber terminal on the VN in the
data center and selects one NVE of the VN as the accessed NVE of the VN; a security tunnel is established between the accessed NVE of the VN and the wide-band subscriber terminal, and the VN access of the wide-band subscriber terminal is completed through the security tunnel. The method solves the problem that the gateway of the data center becomes a
bottleneck because an internet user accesses the VN in the data center.