Searching method and searching system for IP quintuple table entries

Abstract

The invention discloses a searching method and a searching system for IP quintuple table entries, and relates to the technical field of IP communication, and the method comprises the following steps:searching a normalization table, mapping a source IP address in an uplink direction into a source User ID, and mapping a destination IP address in a downlink direction into a destination User ID; replacing the source IP address in the uplink direction in the original IP quintuple with the source User ID, replacing the destination IP address in the downlink direction with the destination User ID toform a new IP quintuple, and adding an identifier for marking the uplink and downlink directions into the new IP quintuple; and performing routing table entry lookup by using the new IP quintuple. According to the invention, the length of the IP quintuple can be shortened, and entry resources required for searching the IP quintuple are remarkably reduced on the premise of ensuring the routing forwarding performance.

Description

technical field [0001] The invention relates to the technical field of IP (Internal Protocol, network protocol) communication, in particular to a search method and search system for an IP quintuple entry. Background technique [0002] Currently, home gateway equipment has been widely used in optical access networks. The routing and forwarding function in the home gateway is realized according to the IP quintuple as the flow processing matching rule. The IP quintuple includes source IP address, destination IP address, protocol type, source port number and destination port number. The protocol type includes TCP ( Transmission Control Protocol, Transmission Control Protocol) and UDP (User Datagram Protocol User Datagram Protocol). [0003] The downlink devices of the home gateway have the following two characteristics: 1. The number of downlink devices is limited. For example, the smart gateway of a certain operator needs to support less than 256 downlink hosts; 2. The address...

AI Technical Summary

Problems solved by technology

In order to solve the shortage of IPv4 address space, IPv6 adopts 128-bit address space, and the number of addresses is almost unlimited. However, the increase of IPv6 address bit width also increases the bit width of IP quintuple, and the home gateway is not good at processing IP quintuple. The requirement for the number of concurrent connections in a group is getting higher and higher, and the routing and forwarding function in the home gateway is realized based on the IP quintuple as the flow processing matching rule. The increase in the bit width of the IP quintuple leads to the flow table required for the corresponding flow processing getting bigger

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