US 2014/0211799 A1 · ROUTING DEVICE AND METHOD FOR PROCESSING NETWORK PACKET THEREOF

Abstract

A method for processing a network packet is used for a routing apparatus. The routing apparatus includes a forwarding engine module and a core module. In the method, a network packet from a source interface is received. Whether or not the network packet meets a Network Address Translation (NAT) packet condition is determined Subsequently, the following steps are executed when the network packet meets the NAT packet condition. In these steps, transmission information of the network packet is read and a NAT mapping table is searched by using the transmission information. When a mapping entry corresponding to the transmission information is found in the NAT mapping table, the method involves enabling the forwarding engine module to update the header of the network packet according to the NAT forwarding information of the corresponding mapping entry and set a destination interface of the network packet.

Claims18

Dependent claims

A method for processing a network packet, the method being configured for a routing apparatus, the routing apparatus comprising a forwarding engine module and a core module, and the method for processing the network packet comprising:

receiving a network packet from a source interface;
determining whether the network packet meets a Network Address Translation (NAT) packet condition;
and
when the network packet meets the NAT packet condition, executing the following steps:
reading transmission information of the network packet and searching a NAT mapping table by using the transmission information;
and
when a mapping entry corresponding to the transmission information is found in the NAT mapping table, enabling the forwarding engine module to update the header of the network packet according to NAT forwarding information of the corresponding mapping entry and to set a destination interface of the network packet.

4 more elements

A routing device, comprising:

a forwarding engine module configured for executing the following steps:
receiving a network packet from a source interface;
determining whether the network packet meets a Network Address Translation (NAT) packet condition;
and
when the network packet meets the NAT packet condition, executing the following steps:
reading transmission information of the network packet and searching a NAT mapping table by using the transmission information;
when a mapping entry corresponding to the transmission information is found in the NAT mapping table, according to NAT forwarding information of the corresponding mapping entry, updating the header of the network packet and setting a destination interface of the network packet;
and
when the network packet does not meet the NAT packet condition, forwarding the network packet;
and
a core module configured for receiving the network packet that does not meet the NAT packet condition from the forwarding engine module, and for processing the network packet that does not meet the NAT packet condition or the network packet that does not correspond to any of the mapping entry in the NAT mapping table.

8 more elements

Dependencies are inferred from the claim text.

Routing device and method for processing network packet thereof

Life of this patent

Routing device and method for processing network packet thereof

Life of this patent

Abstract

Claims18