Optical Domain Ingress Node Trail Overlap Prevention
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Solution Overview
Problem
In IP backbone networks, ensuring that working and protection trails in optical networks do not overlap is challenging, leading to inter-domain information leakage and reduced access security due to the isolation between optical and routing domains in conventional overlay models.
Innovation Solution
A method and apparatus that utilize ingress nodes in optical domains to manage trail establishment requests and responses, ensuring that working and protection trails do not overlap by transmitting specific IP addresses and trail information only between corresponding ingress nodes, thereby preventing inter-domain leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If trail information is saved in head-end router and carried in protection trail establishment requests, then working and protection trails do not overlap, but inter-domain information leakage occurs reducing access security
Solution Approach 1:
The patent extracts the trail information from the head-end router and stores it locally in each ingress node within the optical domain. This allows each ingress node to independently verify trail non-overlap without requiring the head-end router to share trail information with routing domains, thus preventing inter-domain information leakage while maintaining trail non-overlap assurance.
Solution Approach 2:
The patent segments the trail information management by optical domain, where each optical domain's ingress nodes maintain their own trail information independently. This segmentation prevents the aggregation and sharing of trail information across different optical domains and routing domains, thereby preventing inter-domain information leakage while ensuring local trail non-overlap.
2Object-affected harmful factors
If complete information isolation is maintained between optical and routing domains, then access security is improved, but trail overlap cannot be prevented
Solution Approach 1:
The patent segments trail information management by optical domain, with each ingress node maintaining independent trail information. This allows information isolation between optical and routing domains to be preserved for security, while still enabling trail non-overlap verification within each optical domain through local information storage and comparison.
Solution Approach 2:
Each ingress node within an optical domain performs self-service by locally storing and using trail information to verify trail non-overlap. This eliminates the need to share information with routing domains while maintaining the ability to prevent trail overlap, thus preserving access security.
Data Source
AI summary
A method and an apparatus establish a trail in a network, where the method includes: in a process of establishing a first trail, adding, by a first ingress node to a first trail establishment response message, an IP address of the first ingress node and an optical domain; and in a process of establishing a second trail, receiving, by the first ingress node, a first trail request message sent by a second ingress node; and sending, by the first ingress node to the second ingress node in the optical domain, information about a trail that is of the first trail and is in the optical domain to which the first ingress node belongs. According to the embodiments, that a trail that is of a working trail and a protection trail are in each optical domain do not overlap can be met.