Virtual private network VPN service optimization method and device

A third network device, comprising:

• a processor;
• and
• a memory having computer readable instructions stored thereon that, when executed by the processor, cause the third network device to:
• receive a first virtual private network (VPN) route sent by a first network device, wherein the first VPN route carries information about a second VPN route sent from a second network device to the first network device, the second VPN route carries first identification information, the first identification information uniquely identifies, in the third network device, a first VPN instance accessing the third network device, second VPN route comprises second identification information, the second identification information uniquely identifies a second VPN instance in the second network device, and the first identification information is different from the second identification information;
• and
• add the first VPN route to a routing table of the first VPN instance.

A virtual private network (VPN) service optimization method, comprising:

• obtaining, by a first network device, a first VPN route sent by a second network device, wherein the first VPN route comprises first identification information, and the first identification information uniquely identifies a first VPN instance in the second network device;
• generating, by the first network device, a second VPN route according to a second VPN instance accessing a third network device and the first VPN route, the second VPN route carries second identification information and routing information of the first VPN route, the second identification information uniquely identifies the second VPN instance in the third network device, and the first identification information is different from the second identification information;
• and
• sending, by the first network device, the second VPN route to the third network device.