Abstract: According to an example a Dynamic Virtual Private Network (D-VPN) large-scale networking method includes establishing, by a Spoke, a DVPN channel with a Hub; issuing, by the Spoke, subnet information about the Spoke to the Hub; and obtaining, by the Spoke, subnet information about the Hub and another Spoke as well as corresponding private network address of a next hop sent by the Hub.

Abstract: A Dynamic Virtual Private Network (DVPN) includes Virtual Private Network (VPN) Address Management (VAM) clients and a VAM server, and each VAM client includes a private gateway address, public address and subnet of the VAM client that are provided to the VAM server when registering in the VAM server. When a source VAM client receives a packet that is sent by a subnet of the source VAM client to a subnet of a destination VAM client, the source VAM client requests the VAM server to provide a next-hop address of subnet, a private gateway address, a public address and subnet of the destination VAM client to establish a DVPN tunnel between the source VAM client and the destination VAM client.

Abstract: According to an example a Dynamic Virtual Private Network (D-VPN) large-scale networking method includes establishing, by a Spoke, a DVPN channel with a Hub; issuing, by the Spoke, subnet information about the Spoke to the Hub; and obtaining, by the Spoke, subnet information about the Hub and another Spoke as well as corresponding private network address of a next hop sent by the Hub.

Abstract: The present invention discloses a method for detecting sequence number of the packet during multi-units sending process, wherein all of the sequence numbers of the packets are pre-divided into non-overlapping subsets, the number of the subsets being at least equal to the number of units comprised by the sending party, and each subset is assigned to a unit; the receiving party determines a sliding window according to each subset, and records the correlation between the sliding window and the sequence number subset; then, the receiving party determines whether the packet is a valid packet according to the correlation and the sequence number of the packet sent from the sending party. At the same time, the invention discloses a packet sending device, a packet receiving device, and a system for detecting sequence number of the packet during multi-units sending process.

Abstract: The present invention discloses a method for detecting sequence number of the packet during multi-units sending process, wherein all of the sequence numbers of the packets are pre-divided into non-overlapping subsets, the number of the subsets being at least equal to the number of units comprised by the sending party, and each subset is assigned to a unit; the receiving party determines a sliding window according to each subset, and records the correlation between the sliding window and the sequence number subset; then, the receiving party determines whether the packet is a valid packet according to the correlation and the sequence number of the packet sent from the sending party. At the same time, the invention discloses a packet sending device, a packet receiving device, and a system for detecting sequence number of the packet during multi-units sending process.