Method for realizing Internet protocol (IP) express forwarding and three-layer forwarding equipment
A device and IP packet technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as inability to find Cache entries, inability to implement IP fast forwarding, etc., to achieve the effect of IP fast forwarding
Active Publication Date: 2014-05-14
NEW H3C TECH CO LTD
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[0015] It can be seen that after QOS processing, one data stream will be converted into multiple data streams, and the Cache entry only saves the relevant information for one data stream before QOS processing, so the multiple data streams after QOS processing cannot be IP fast forwarding cannot be implemented by looking for Cache entries
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[0034] The invention proposes a method for realizing IP fast forwarding, and the method is used for IP fast forwarding of the data flow processed by QOS. Such as figure 2 Realize the flow chart of the method for IP fast forwarding for the present invention, this method comprises:
[0035] Step 201: Receive the IP message of the data stream, query the Cache entry of the inbound direction according to the IP quintuple of the IP message, the TOS information of the inbound direction and the inbound interface, when the inbound direction processing information for the data stream is queried, Execute step 202; when the inbound direction processing information for the data flow cannot be queried, execute step 203;
[0036] Step 202: Perform inbound service processing on the IP packet according to the inbound direction processing information for the data flow, and obtain the outbound interface of the IP packet from the inbound direction processing information, and continue to execute...
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The invention provides a method for realizing Internet protocol (IP) express forwarding and three-layer forwarding equipment, wherein the method comprises the following steps of: receiving an IP message of a data stream, querying cache table entries in an enter direction and cache table entries in an exit direction successively, and processing the IP message according to a query result; when the process information of the enter direction and the exit direction aiming at the data stream cannot be queried, querying a basic table entry which is saved in advance so as to acquire the process information of the enter direction and the exit direction aiming at the data stream, then processing the IP message according to the acquired information and storing the acquired information into the cache table entries in the enter direction and the cache table entries in the exit direction. By the method, the IP express forwarding of the data stream processed by quality of service (QOS) can be realized.
Description
technical field [0001] The invention relates to the technical field of IP fast forwarding, in particular to a method for realizing IP fast forwarding and a three-layer forwarding device. Background technique [0002] The idea of accelerating processing based on a cache memory (Cache) is widely used in the computer field, including the hardware and software fields. The basic idea is: for the first-time process, process the first-time process based on basic entries, and create corresponding Cache entries; for non-first-time processes, perform accelerated processing based on previously established Cache entries. When the content of the basic entry changes, the corresponding Cache entry is invalidated, and the processing flow switches back to the initial flow. [0003] When a Layer 3 forwarding device forwards IP packets, it can also apply the above-mentioned idea of accelerating processing based on the cache to realize fast forwarding of IP packets. This method is called I...
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IPC IPC(8): H04L12/70H04L12/773
Inventor 王海东
Owner NEW H3C TECH CO LTD