System and method for realizing OLT voice double upper-link protection based on OSPF routing protocol

Abstract

The invention discloses a system and a method for realizing OLT (Optical Line Terminal) voice double upper-link protection based on OSPF (Open Shortest Path First Interior Gateway Protocol) routing protocol, and relates to the field of PON (Passive Optical Network). A CPU of an OLT master control panel in the system comprises an OSPF module and an RTM (Running Timer Meter) module. Two upper-link ports of an OLT are respectively connected with a NGN (Next Generation Network) through three-layer exchangers A and B to connect with a remote-end MGC (Media Gateway Controller) server; paths A and B are formed between the OLT and the MGC server; the OLT and the three-layer exchangers A and B are respectively configured with the OSPF protocols and operate; the OLT learns the routes of all network sections on the paths A and B through the OSPF route protocol; the OSPF module stores the learnt routes in the route table of the OSPF module and announces the learnt routes to the RTM module; and the RTM modules collects the route items and writes the route items in an RIB table. When a main link breaks, the OSPF route protocol learns the route of a backup link and carries out rapid protective rearrangement to the high real-time voice business among internetworking nodes.

Description

technical field [0001] The present invention relates to the field of PON (Passive Optical Network, passive optical network), in particular to a kind of based on OSPF (Open Shortest Path First, open shortest path first) routing protocol to realize OLT (Optical Line Tterminal, optical line terminal) voice dual A system and method for uplink protection. Background technique [0002] With the progress of society and the development of the network, people's dependence on the network is becoming stronger and stronger, and the demand for high reliability of the network is also becoming more and more prominent. Once any failure occurs in the network, it will affect people's normal life and work. have an immeasurable impact. Therefore, how to build a secure and stable network has become the primary and key issue faced by operators and equipment manufacturers. [0003] Network protection capability is the self-healing feature of the network. When the network with protection capabili...

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Problems solved by technology

[0004] The Chinese invention patent application with the application number 200910130939.9 "A Method for Uplink Board Protection of Carrier-Class Broadband Access Equipment" proposes a solution with simple configuration, low overhead, and fast switching within a few milliseconds. This protection It is a kind of link layer protection method. It has many advantages, but it is only applicable to the inside of the LAN, and it is realized based on the OLT as a layer 2 device; on the other hand, based on the protection of the Ethernet layer, networking needs to be considered Otherwise, the uplink Ethernet may be looped, resulting in a broadcast storm

According to the current development trend, the OLT is more of a three-layer device. The traditional PON system can implement voice services, but it cannot implement network protection switching for high-real-time voice services between the Internet on the three-layer device. Faults will have a great impact on users

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