| 摘要 |
A network system includes at least one controller and a plurality of forwarding devices, where the forwarding devices form a plurality of virtual network topologies; the controller is configured to allocate a global label to each of the plurality of virtual network topologies, and send a binding relationship between the global labels and the virtual network topologies to the forwarding devices, where global labels allocated by the controller to different virtual network topologies of the virtual network topologies are different; the forwarding devices are configured to receiving the binding relationship, and generate, according to the binding relationship, label forwarding entries including a mapping relationship between the global labels and forwarding information bases of the virtual network topologies; and when a packet received by the forwarding device carries a global label, the forwarding device finds, by searching according to the global label, a forwarding information base of a virtual network topology corresponding to the global label, and determines that the packet is to be forwarded by using the forwarding information base of the virtual network topology. |
