Method and system for OLT loopback detection in a gpon system

Abstract

The present invention relates to the technical field of optical communication. Disclosed is a method for OLT loopback detection in a GPON system. The method comprises: S1, initializing a packet receiving processing task of the CPU of an OLT device, so as to perform packet receiving of a message, and recognizing whether the received message is a two-layer study mac address flapping message, if so, proceeding to S2, and if not, ending; S2, initializing a two-layer study processing task of the OLT device, and copying the message to the CPU of the OLT device while enabling loopback of the two-layer study mac address flapping detection; S3, performing polling of whether the two-layer study mac address flapping message is received, if so, proceeding to S4, and if not, repeating S3; and S4, performing alert processing. Further disclosed in the present invention is a system for OLT loopback detection in a GPON system. The present invention effectively detects loopback in the GPON system.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a method for OLT loopback detection in a GPON system and a system for OLT loopback detection in the GPON system. Background technique [0002] GPON (Gigabit-Capable PON, Passive Optical Access System) technology is the latest generation broadband passive optical integrated access standard based on the ITU-TG.984.x standard, with high bandwidth, high efficiency, large coverage and rich user interfaces And many other advantages, it is considered by most operators as an ideal technology to achieve broadband and comprehensive transformation of access network services. In the data encapsulation of GPON, the ONU (Optical Network Unit, optical network unit) receives the upstream data from the UNI (User Network Interface, user network interface), and the ONU encapsulates the upstream data into a GEM frame and sends it to the OLT (opticalline terminal, the optical line term...

AI Technical Summary

Problems solved by technology

[0003] Normally, the OLT line chuck in the GPON system supports 16 PON (Passive Optical Network, Passive Optical Network) ports, and each PON port has a split ratio of 128. If there is a data or protocol message ring in the link due to some reasons Forwarding will cause a data storm in the network and affect the normal business operation. Therefore, it is extremely important to implement loopback detection in the GPON system

[0004] In the prior art, the ring network detection protocol is generally used for loopback detection in the GPON system. The ring network detection protocol has the advantages of not being based on network topology calculation, active loop discovery and ring breaking. The ring network detection protocol passes through a certain port The port information carried in the received detection message is used to determine whether the port forms a loop. The detection message usually uses a special vlan (Virtual Local Area Network, Virtual Local Area Network) and Ethernet type, and carries the port information sent to the port. The detection method through the detection message can meet the application requirements of the GPON system, but this detection method requires both the OLT and the ONU to support the identification, tracking, detection and ring breaking of the detection message, and there are detection limitations.

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