Abstract: A method for implementing network virtualization, and a related apparatus and a communications system are provided. The method for implementing network virtualization may include: receiving, by an SDN controller, a virtual network creation request that carries virtual network topology information; creating a virtual network in response to the virtual network creation request; establishing, by the SDN controller, a device mapping relationship; establishing, by the SDN controller, a port mapping relationship; allocating, by the SDN controller, a virtual SDN controller to the virtual network; and registering, by the SDN controller, a first virtual forwarding device and a second virtual forwarding device with the virtual SDN controller. Technical solutions of embodiments of the present invention help to improve networking flexibility, reduce service costs, and shorten a service deployment period.

Abstract: A method for sending a connection establishment request is provided, comprising: sending a parameter requesting message to a configuration server from an OpenFlow switch for obtaining connection parameters of an OpenFlow controller; receiving by the OpenFlow switch an Internet Protocol (IP) address and a set of OpenFlow controller connection parameters sent from the configuration server, the set of connection parameters comprising at least connection parameters of a first OpenFlow controller; sending a connection establishment request message to the first OpenFlow controller from the OpenFlow switch according to the IP address and the connection parameter of the first OpenFlow controller. An OpenFlow switch, a configuration server and a system for sending a connection establishment request are also provided. With the solutions provided in embodiments of the disclosure, the automatic connection establishment between the OpenFlow switch and the OpenFlow controller can be realized.

Abstract: The present invention provides a route calculation method and a master node device in a virtual network element. The method includes: receiving and storing, by the master node, topology information; performing, according to a topology type of the VNE, topology verification for all topology information locally stored on the master node; and calculating, after the topology verification is passed, internal paths in the VNE and weights of the internal paths, generating and storing an internal routing entry, and sending the internal routing entry to nodes except the master node in the VNE. Therefore, in various topology structures, such as a dual-homing tree, a ring, and a half ring, calculation of the internal routes in the VNE and load balancing within the VNE can be implemented.

Abstract: A method for establishment a pseudo wire (PW) is disclosed, including: receiving a first label mapping (LM) message, where the first LM message carries a PW ID, PW parameters, and label switching path (LSP) tunnel information that are selected by the sender of the first LM message; matching a local PW according to the PW ID; performing parameter negotiation of the local PW according to the PW parameters; matching a local tunnel according to the LSP tunnel information; binding the local tunnel and the local PW when the matching between the PW ID and the LSP tunnel information is successful; and establishing a PW when the parameter negotiation is successful. A device and system for establishing a PW are also disclosed. With the present invention, a PW service is associated with an LSP tunnel to improve the reliability of the information transmission process.

Abstract: The present invention provides a method for receiving information, a method for sending information, and apparatuses for the same. The method for receiving information includes: when a control plane apparatus is capable of managing a forwarding plane apparatus, receiving, by the forwarding plane apparatus, information used for packet forwarding path calculation sent by the control plane apparatus, where the forwarding plane apparatus and the control plane apparatus are located in a network with a network architecture featuring forwarding and control element separation. According to the technical solutions provided in embodiments of the present invention, the forwarding plane apparatus does not need to actively obtain the information used for packet forwarding path calculation before calculating a packet forwarding path based on the information used for packet forwarding path calculation.

Abstract: A message transmitting method is provided, comprising: receiving a first message sent from a first OpenFlow switch by an OpenFlow controller; transmitting a first response message to the first OpenFlow switch by the OpenFlow controller when the OpenFlow controller determines that the first OpenFlow switch is under the management of the OpenFlow controller, wherein the first response message comprises type information and parameters related to the OpenFlow controller, the first connection is a connection to be established between the first OpenFlow switch and the OpenFlow controller, and the first response message corresponds to the first message. Furthermore, other message transmitting methods, message receiving methods, OpenFlow controllers and first OpenFlow switches are provided in embodiments of the present invention.

Abstract: A method for establishment a pseudo wire (PW) is disclosed, including: receiving a first label mapping (LM) message, where the first LM message carries a PW ID, PW parameters, and label switching path (LSP) tunnel information that are selected by the sender of the first LM message; matching a local PW according to the PW ID; performing parameter negotiation of the local PW according to the PW parameters; matching a local tunnel according to the LSP tunnel information; binding the local tunnel and the local PW when the matching between the PW ID and the LSP tunnel information is successful; and establishing a PW when the parameter negotiation is successful. A device and system for establishing a PW are also disclosed. With the present invention, a PW service is associated with an LSP tunnel to improve the reliability of the information transmission process.

Abstract: A method for establishment a pseudo wire (PW) is disclosed, including: receiving a first label mapping (LM) message, where the first LM message carries a PW ID, PW parameters, and label switching path (LSP) tunnel information that are selected by the sender of the first LM message; matching a local PW according to the PW ID; performing parameter negotiation of the local PW according to the PW parameters; matching a local tunnel according to the LSP tunnel information; binding the local tunnel and the local PW when the matching between the PW ID and the LSP tunnel information is successful; and establishing a PW when the parameter negotiation is successful. A device and system for establishing a PW are also disclosed. With the present invention, a PW service is associated with an LSP tunnel to improve the reliability of the information transmission process.

Abstract: The present invention provides a route calculation method and a master node device in a virtual network element. The method includes: receiving and storing, by the master node, topology information; performing, according to a topology type of the VNE, topology verification for all topology information locally stored on the master node; and calculating, after the topology verification is passed, internal paths in the VNE and weights of the internal paths, generating and storing an internal routing entry, and sending the internal routing entry to nodes except the master node in the VNE. Therefore, in various topology structures, such as a dual-homing tree, a ring, and a half ring, calculation of the internal routes in the VNE and load balancing within the VNE can be implemented.

Abstract: A method for sending a connection establishment request is provided, comprising: sending a parameter requesting message to a configuration server from an OpenFlow switch for obtaining connection parameters of an OpenFlow controller; receiving by the OpenFlow switch an Internet Protocol (IP) address and a set of OpenFlow controller connection parameters sent from the configuration server, the set of connection parameters comprising at least connection parameters of a first OpenFlow controller; sending a connection establishment request message to the first OpenFlow controller from the OpenFlow switch according to the IP address and the connection parameter of the first OpenFlow controller. An OpenFlow switch, a configuration server and a system for sending a connection establishment request are also provided. With the solutions provided in embodiments of the disclosure, the automatic connection establishment between the OpenFlow switch and the OpenFlow controller can be realized.

Abstract: A method for an Ethernet to bear ATM cells includes: mapping the ATM virtual connection information in the first ATM cell received from the ATM network to an Interworking Identifier (IW ID); combining the IW ID and the cell payload of the first ATM cell into an Ethernet frame; and transmitting the Ethernet frame in an Ethernet network. An apparatus for an Ethernet to bear ATM cells is also disclosed. The embodiments of the present invention implement network interworking on the data link layer (layer 2) and enable an ATM network to perform ATM emulation in a metropolitan area Ethernet (MEN) independently of the upper-layer protocol, thus facilitating the user.

Abstract: A method for establishment a pseudo wire (PW) is disclosed, including: receiving a first label mapping (LM) message, where the first LM message carries a PW ID, PW parameters, and label switching path (LSP) tunnel information that are selected by the sender of the first LM message; matching a local PW according to the PW ID; performing parameter negotiation of the local PW according to the PW parameters; matching a local tunnel according to the LSP tunnel information; binding the local tunnel and the local PW when the matching between the PW ID and the LSP tunnel information is successful; and establishing a PW when the parameter negotiation is successful. A device and system for establishing a PW are also disclosed. With the present invention, a PW service is associated with an LSP tunnel to improve the reliability of the information transmission process.

Abstract: A method for an Ethernet to bear ATM cells includes: mapping the ATM virtual connection information in the first ATM cell received from the ATM network to an Interworking Identifier (IW ID); combining the IW ID and the cell payload of the first ATM cell into an Ethernet frame; and transmitting the Ethernet frame in an Ethernet network. An apparatus for an Ethernet to bear ATM cells is also disclosed. The embodiments of the present invention implement network interworking on the data link layer (layer 2) and enable an ATM network to perform ATM emulation in a metropolitan area Ethernet (MEN) independently of the upper-layer protocol, thus facilitating the user.