Protection method and system for multi-point fiber cut in communication network

Abstract

The invention discloses a method and system for protecting multi-point fiber cuts in a communication network, and relates to the technical field of backhaul networking. The invention sets a monitoring group and a control group on the main aggregation device, and corresponds to the main aggregation device that needs to be monitored. Each link of the monitoring group is added to the monitoring group, and the link status switch corresponding to each link of the monitoring group is added to the control group; when the main aggregation device detects that all links in the monitoring group generate alarms, it turns off all link switches in the control group; The access device detects that the status of the primary PW link is down, which triggers the switchover of the access device. The technical solution of the present application does not require control plane intervention, saves main control CPU resources, and speeds up service switching time.

Description

technical field [0001] The invention relates to the technical field of backhaul networking, in particular to a method and system for protecting multi-point fiber cuts in a communication network. Background technique [0002] The aggregation device is configured as a base station gateway, the access ring is configured with PW (Pseudo-Wire, pseudo-wire) redundancy protection, and the aggregation ring is configured with VPN FRR protection. Handover technology is based on the dual-homing network model. When the optical path between two aggregation devices fails, and the optical path between one of the aggregation devices and a core device also fails, the aggregation device becomes an isolated point in the aggregation ring, but in the access ring, Since the access ring and the convergence ring are in different IGP (Interior Gateway Protocol, Interior Gateway Protocol) domains, the business status of all access devices to the convergence device is still normal, and the base stati...

AI Technical Summary

Problems solved by technology

When the optical path between two aggregation devices fails, and the optical path between one of the aggregation devices and a core device also fails, the aggregation device becomes an isolated point in the aggregation ring, but in the access ring, Since the access ring and the convergence ring are in different IGP (Interior Gateway Protocol, Interior Gateway Protocol) domains, the business status of all access devices to the convergence device is still normal, and the base station business will still be sent to the convergence device, but The convergence device has now become an isolated point. During service transmission, all service packets can only be discarded because there is no routing exit, which leads to service interruption and the occurrence of multi-point fiber cut scenarios.

[0003] For the above-mentioned multi-point fiber cut scenario, a common solution for various equipment manufacturers is: the control plane of the isolated convergence equipment combines the BGP (Border Gateway Protocol, Border Gateway Protocol) peer (peer) status with the VC (private network flag) state association, the control plane will take the initiative to set the VC state to down (turn off) after the peer is disconnected, thereby triggering the switchover of the access device, but this solution requires the control plane to intervene, and the calculation of the protocol state needs to be costly A large number of main control CPU resources, and because the software perceives the service status, the service switching takes a long time

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