Networking method for ring network of packet transport network

Abstract

The invention discloses a networking method for a ring network of a packet transport network. The method comprises the following steps: enabling a three-layer IP route forwarding function at a convergence layer site of the PTN, and dividing other access layer sites to different access rings according to the rings, wherein the access layer sites are positioned in the same two-layer switching network. The method of the invention avoids a loop circuit on the ring network of the PTN, meanwhile meets the requirement of the network management function of the PTN and the requirement of high reliability of services, and simultaneously can meet the requirement for protecting the quick switching function of the TMPLS service from being affected by STP convergence.

Description

technical field [0001] The present invention relates to the field of communications, and more specifically, to a networking method for a packet transport network (Packet Transport Network, PTN for short) ring network. Background technique [0002] The bearer network introduces PTN networking. PTN is based on a pure packet core and combines the reliability of the transmission network with the flexibility of the data network. It must have strong network management capabilities. The network management needs to deploy routes and use IP addresses to manage network elements. Therefore, a flexible networking is required to be compatible with deploying data services and network management services. [0003] figure 1 It shows a typical PTN network application network, which includes intersecting ring and tangent ring ring networking. Rings 1-14 in the figure are all access rings, which are connected to the aggregation ring through the aggregation node , a network management server...

AI Technical Summary

Problems solved by technology

When the link C-F of the main path fails, or the node C on the main path fails, the instance 0 of the STP protocol and all other instances configured by the user will perform a recalculation, and re-determine the master device of the ring network according to the calculation result. Determine whether there is a loop, or select a port that is forwarded or not forwarded by the network. This process depends on the performance of the device and the number of devices on the network. It will take a long period of time. At the same time, due to the failure of the main path, the tunnel from A to F The group detects the main path signal failure (Signal Fail, referred to as SF), and a link switch occurs when a failure occurs, switching to the backup path, and the APS (Automatic Protection Switching, automatic protection switching) protocol sends an SF switchover, which usually only takes 50ms Even 10ms, and because STP is recalculating, the basic forwarding of the layer 2 network will be blocked during this period. After the recalculation is completed, the port is open for service forwarding, so the switching time will add the recalculation time of the STP protocol

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