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 of the 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 forwarding an 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 way is to use the access control list (ACL) to realize the downstream VLAN restoration operation to specific media access control (MAC, Media AccessControl) flow, but when multiple MAC addresses appear under the same user VLAN, A large amount of ACL resources of the OLT device will be consumed, so the method of restoring user VLAN based on the MAC address will be greatly restricted in application. In addition, because this method needs to be m...

AI Technical Summary

Problems solved by technology

In the prior art, the usual way is to use the access control list (ACL) to realize the downstream VLAN restoration operation to specific media access control (MAC, Media AccessControl) flow, but when multiple MAC addresses appear under the same user VLAN, A large amount of ACL resources of the OLT device will be consumed, so this method of restoring user VLANs based on MAC addresses will be greatly restricted in applications

In addition, because 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, and the way of adding ACL in real time will further increase the burden on the CPU, increase the load on the system and overhead

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