Device and method for realizing message repeating

Abstract

The invention discloses a device for realizing message forwarding. By using the second memory to store the forwarding information of the forwarded message, the first memory stores the forwarding information of all messages, and controls the query of the forwarding information through the query control unit. , when receiving a message to be forwarded, the query control unit first inquires whether the forwarding information of the message to be forwarded is stored in the second memory, if so, then obtains the forwarding information stored in the second memory, otherwise, queries the first The storage acquires the forwarding information of the message to be forwarded and caches the forwarding information in the second memory for storage, and then acquires the forwarding information of the message to be forwarded, and finally realizes the forwarding of the message. In addition, the invention also discloses a corresponding method. The invention reduces the time for processing the message and improves the utilization rate and processing performance of the system bandwidth.

Description

technical field [0001] The invention relates to a message processing technology, in particular to a device and method for realizing message forwarding. Background technique [0002] During the process of transmitting packets in the communication network, the access device often needs to forward the received packets. In order to realize the forwarding of high-speed cells or packets, usually the access device uses hardware to obtain the forwarding information of the packets to be forwarded. The time for querying the forwarding information is generally represented by how many system clock cycles (cycle). In order to achieve the wire-speed processing capability of the message processing equipment, the time requirement for forwarding information query is very high. For example, if the processing equipment of the Gigabit Ethernet (GE, Gigabit Ethernet) , the system clock is 62.5M. For a 64-bit (Byte) packet, when a GE interface is used, the time left for the hardware device to p...

AI Technical Summary

Problems solved by technology

Usually, it takes 5 clock cycles or more for a read operation of SSRAM memory, plus 1 cycle comparison time, the average query time is at least 4×6=24 cycles, and SSRAM stores a lot of information items, other functions The module also needs to be read or written, so it often needs to wait for the service, and the time to process a message will be longer. Obviously, the existing technology needs to query the information items one by one when querying the forwarding information, which takes up too much hardware query time , which is not conducive to wire-speed processing, thus prolonging the processing time of the message, causing a large forwarding delay, and affecting the utilization rate and processing performance of the system bandwidth

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