Abstract: A method for packet routing in a network is disclosed. The network includes a network controller, a first switch connected to the network controller, a first server directly connected to the first switch, and a second server. The network controller obtains network connection information of the two servers. The network connection information indicates that the first server belongs to a first subnet and the second server belongs to a second subnet, the first subnet and the second subnet are two different subnets, and the two different subnets are configured on a same router. The network controller sends configuration information to the first switch. The configuration information configures the first switch to modify a packet header of a packet sent from the first server to the second server, and forward the modified packet to the second server.

Abstract: A method for packet routing in a network is disclosed. The network includes a network controller, a first switch connected to the network controller, a first server directly connected to the first switch, and a second server. The network controller obtains network connection information of the two servers. The network connection information indicates that the first server belongs to a first subnet and the second server belongs to a second subnet, the first subnet and the second subnet are two different subnets, and the two different subnets are configured on a same router. The network controller sends configuration information to the first switch. The configuration information configures the first switch to modify a packet header of a packet sent from the first server to the second server, and forward the modified packet to the second server.

Abstract: A method for distributed routing of a packet in a network is provided. The network includes a controller, a first server, a second server, and a first switch. The method includes: obtaining identifiers of the two servers in the network and network connection information; determining whether the two servers are in two different subnets of the network and whether the two different subnets are configured on a same router according to the identifiers of the two servers and the network connection information of the two servers; when it is determined that that the two servers are in two different subnets of the network and the two different subnets are configured on a same router, instructing the first switch to modify a packet header of a packet sent by the first server to the second server and forward the modified packet to the second server.

Abstract: A method for distributed routing of a packet in a network is provided. The network includes a controller, a first server, a second server, and a first switch. The method includes: obtaining identifiers of the two servers in the network and network connection information; determining whether the two servers are in two different subnets of the network and whether the two different subnets are configured on a same router according to the identifiers of the two servers and the network connection information of the two servers; when it is determined that that the two servers are in two different subnets of the network and the two different subnets are configured on a same router, instructing the first switch to modify a packet header of a packet sent by the first server to the second server and forward the modified packet to the second server.