Abstract: A method for converting network packets and a circuit system are provided. The circuit system uses firmware therein to record tables for implementing packet conversion between two types of networks (IPv4 and IPv6). In the method, a process of mapping of address and port using encapsulation (MAP-E) or a process of mapping of address and port using translation (MAP-T) is determined according to IPv4 packets routing requirement to embody an uplink and a downlink packet conversion process. A content table stores an IPv6 packet header after the MAP-E or MAP-T process. A control table is referred to for controlling the fields to be updated when adding the IPv6 packet header. A forwarding mapping rule table is referred to for determining to convert a destination IP address of an uplink IPv6 packet, or both a source IP address and a destination IP address of a downlink IPv4 packet.

Abstract: A method for accelerating the generation of Virtual Extensible Local Area Network (VXLAN) packets with an application specific integrated circuit (ASIC) includes the following steps: determining whether an original packet is an upstream packet; when the original packet is the upstream packet, determining whether the original packet is for a VXLAN egress interface; when the original packet is for the VXLAN egress interface, adding a prototype outer header to the front of the original packet and thereby generating a VXLAN packet; and after generating the VXLAN packet, determining whether to modify the content of the prototype outer header.

Abstract: A method for converting network packets and a circuit system are provided. The circuit system uses firmware therein to record tables for implementing packet conversion between two types of networks (IPv4 and IPv6). In the method, a process of mapping of address and port using encapsulation (MAP-E) or a process of mapping of address and port using translation (MAP-T) is determined according to IPv4 packets routing requirement to embody an uplink and a downlink packet conversion process. A content table stores an IPv6 packet header after the MAP-E or MAP-T process. A control table is referred to for controlling the fields to be updated when adding the IPv6 packet header. A forwarding mapping rule table is referred to for determining to convert a destination IP address of an uplink IPv6 packet, or both a source IP address and a destination IP address of a downlink IPv4 packet.

Abstract: The present disclosure provides a gateway controlling chip and a network packet processing method thereof. The gateway controlling chip is configured to: retrieve a network packet; determine that the network packet is an upstream IP tunneling network packet; determine a packet type of the upstream IP tunneling network packet; retrieve a packet operation list corresponding to the packet type, wherein the packet operation list records a plurality of packet operations; and perform the packet operations for processing the network packet.

Abstract: The present disclosure provides a gateway controlling chip and a network packet processing method thereof. The gateway controlling chip is configured to: retrieve a network packet; determine that the network packet is an upstream IP tunneling network packet; determine a packet type of the upstream IP tunneling network packet; retrieve a packet operation list corresponding to the packet type, wherein the packet operation list records a plurality of packet operations; and perform the packet operations for processing the network packet.