Method and device for acquiring label forwarding list item and forwarding message
A tag forwarding table and tag forwarding technology, which is applied in the field of tag forwarding table item acquisition, can solve the problems of large tag forwarding table items, waste of resources, and limited resources, and achieve the effect of reducing complexity, saving storage space, and satisfying forwarding
Inactive Publication Date: 2012-03-21
深圳市智通天下科技服务有限公司
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[0009] In this way, since each processing board on the device 102 is configured with 1M labels, it greatly exceeds the actual needs
On the other hand, the size of random access memory (RAM) is very limited on the processing board, and the RAM of each processing board usually does not exceed 8M, which wastes a lot of resources and increases the Process board cost
At the same time, due to the large number of label forwarding entries on the processing board, the complexity of the main control board and processing board is also increased.
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[0050] The implementation of the embodiments of the present invention will be described below in conjunction with illustrations. In order to describe the embodiments of the present invention in more detail, we will describe the problems involved therein as follows.
[0051] In actual network application scenarios, different devices will centrally forward and process messages corresponding to a certain fixed label space for a period of time due to different network locations and different application problems, and the label is A short identifier with a fixed length and only local significance, which is used to uniquely identify the FEC FEC to which an MPLS message belongs. Packets of the same forwarding equivalence class will be treated exactly the same in the MPLS network.
[0052] Similarly, for different processing boards on some devices, it may only process packets with limited label space instead of full label space. In order to facilitate centralized processing and simpl...
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The embodiment of the invention provides a method and a device for acquiring a label forwarding list item and forwarding a message. The message forwarding method comprises the following steps: a processing panel receives a multi-protocol label switching (MPLS) message containing a label of a label switched path and searches a label forwarding list item of the label in label forwarding list items stored by the processing panel; if the label forwarding list item of the label is found, then the MPLS message is forwarded according to the label forwarding list item; if the label forwarding list item of the label is not found, then the value of the label is reported to a main control panel; the processing panel receives and stores the label forwarding list item found by the main control panel of the label; and when the MPLS message containing the label is received again, the processing panel forwards the message according to the label forwarding list item. The technical scheme of the embodiment of the invention meets the requirement of forwarding all messages, saves the memory space of the processing panel and simultaneously reduces the complexity of the main control panel and the processing panel.
Description
technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for acquiring label forwarding entries, and a method and device for message forwarding. Background technique [0002] Multi Protocol Label Switching (MPLS, Multi Protocol Label Switch) is a protocol originally proposed to improve the forwarding speed of routers, and has increasingly become an important standard for expanding the network scale. The key to the MPLS protocol is the introduction of the concept of a label. It is a short and easy-to-handle information content that does not contain topological information and only has local significance. Label is short for ease of handling, and can usually be directly referenced with an index; it only has partial meaning for easy access. MPLS uses short and fixed-length labels to encapsulate packets, and realizes fast forwarding on the data plane. As the main control board of the control plane, MPLS ...
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IPC IPC(8): H04L12/56H04L12/46H04L45/50
Inventor 吕永鑫郭金灿
Owner 深圳市智通天下科技服务有限公司