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Method for realizing N:1 virtual local area network (VLAN) mapping in 10 gigabit-capable passive optical network (10GPON) system

A SUB-PORT, purpose technology, applied in transmission systems, digital transmission systems, data exchange through path configuration, etc., can solve the problems of ACL resource consumption of OLT equipment, increase system load and overhead, and increase CPU burden, etc. Reduce the load and overhead, reduce the burden on the CPU, the effect of large capacity

Inactive Publication Date: 2012-11-21
FENGHUO COMM SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the usual practice is to use the Access Control List (ACL) to implement the downstream VLAN restoration operation on a specific Media Access Control (MAC, Media Access Control) flow. However, when multiple MAC addresses appear under the same user VLAN , will consume a large amount of ACL resources of the OLT device, so this method of restoring user VLANs based on MAC addresses will be greatly restricted in applications
In addition, since this method needs to be monitored in real time by the CPU, so as to add the new MAC address to the N: 1 conversion in time, the method of adding ACL in real time will further increase the burden on the CPU and increase the system load and overhead

Method used

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  • Method for realizing N:1 virtual local area network (VLAN) mapping in 10 gigabit-capable passive optical network (10GPON) system
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  • Method for realizing N:1 virtual local area network (VLAN) mapping in 10 gigabit-capable passive optical network (10GPON) system

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Embodiment Construction

[0027] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0028] The basic idea of ​​the present invention is: because existing method is limited to using MAC address as the matching condition of restoring N:1VLAN conversion, and needs to write MAC in the ACL rule, and the capacity of ACL is very limited compared with MAC address, Considering limited ACL resources should not be consumed in this application. In the upstream data direction of the OLT device, we use a tag generated by the original user’s VLAN information, and use the characteristics of the large capacity of the forwarding table to allow the forwarding table to use this tag based on the user’s original VLAN characteristics when learning MAC addresses and VLANs. Recorded in the forwarding table, thereby avoiding limited ACL resources; in this way, in the data downlink direction of the OLT device, the...

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Abstract

The invention discloses a method for realizing N:1 virtual local area network (VLAN) mapping in a 10 gigabit-capable passive optical network (10GPON) system. The method comprises the following steps of: when user side data stream enters an optical line terminal (OLT), generating the original VLAN mapping label of the OLT according to the original VLAN of a user and classifying the service type ofthe data stream; recording the source media access control (MAC) address of the data stream, a converted VLAN and a label which is generated based on the original VLAN in a forwarding table; recording the source MAC address, searching a corresponding destination physical port in a two-layer forwarding table according to the converted local side VLAN and destination MAC of a message and forwardingan uplink message; searching information such as a destination MAC address, the local side VLAN and the like which serve as search results according to the uplink message; and converting the local side VLAN into a new 1:N user VLAN according to mapping label information based on the search results of the forwarding table. Through the method, load of a central processing unit (CPU) can be reduced,and the load and overhead of a system can be reduced.

Description

technical field [0001] The invention relates to a high-speed passive optical communication network access technology, in particular to a method for realizing N:1 virtual local area network (VLAN) mapping in a 10 Gigabit passive optical network (GPON, Gigabit-Capable PON) system. Background technique [0002] In the GPON optical line terminal (OLT) system, the upstream direction of the communication link needs to realize N: 1 VLAN aggregation, and the downstream direction needs to realize 1: N VLAN conversion. In the prior art, the usual practice is to use the Access Control List (ACL) to implement the downstream VLAN restoration operation on a specific Media Access Control (MAC, Media Access Control) flow. However, when multiple MAC addresses appear under the same user VLAN , will cause a large amount of ACL resources of the OLT device to be consumed, so this method of restoring user VLANs based on the MAC address will be greatly restricted in application. In addition, beca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/741
Inventor 邓作沈胜庆雷于红
Owner FENGHUO COMM SCI & TECH CO LTD
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