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

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...

AI Technical Summary

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

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