Forwarding a packet by a NVE in NVO3 network

A computer-implemented method for forwarding a packet by a first Network Virtualization Edge (NVE) in a Network Virtualization Overlays, Layer 3 (NVO3), the method comprising:

• a computer with one or more processors, one or more computer-readable memories, one or more computer-readable tangible storage devices, and program instructions stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, wherein the computer is capable of performing the method comprising:
• in response to receiving an IP packet from a first Virtual Access Point (VAP) of the first NVE, looking up forwarding information by taking a source IP address of the IP packet as an IP address of a first Tenant System (TS) and by taking a first Virtual Network Identifier (VNID) to which the IP packet belongs as a VNID to which the first TS belongs, to obtain an IP address of a second NVE to which the first TS is connected and a second VAP to which the first TS is connected;
• in response to at least one lookup fail, or the IP address of the second NVE being different from an IP address of the first NVE, or the second VAP being different from the first VAP, dropping the IP packet;
• and
• in response to the IP address of the second NVE being the same as an IP address of the first NVE and the second VAP being the same as the first VAP, forwarding the IP packet by using a destination IP address of the IP packet.