TE LSP Owner Binding via RSVP-TE Path Messages
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Solution Overview
Problem
In large-scale networking scenarios, existing methods for configuring and managing Multi-Protocol Label Switching Traffic Engineering (MPLS-TE) are error-prone and inflexible, making it difficult to establish and manage dedicated label switched paths (LSPs) for specific tenants or services, which hinders effective isolation and security.
Innovation Solution
A method and system that utilize RSVP-TE-based messages to establish dedicated TE LSPs by including owner-related information in Path messages, allowing egress nodes to determine and store correspondence between TE LSP identification and owner information, enabling secure and dynamic management of TE LSPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tenant or service related attributes are configured for each TE LSP after establishment using conventional methods, then the TE LSP can be established, but the configuration process becomes error-prone and inapplicable to large-scale networking scenarios
Solution Approach 1:
The patent applies preliminary action by including tenant or service related attributes in the Path message during the TE LSP establishment phase, rather than configuring them afterward. This allows attributes to be set upfront when the LSP is created, eliminating subsequent manual configuration steps and reducing errors in large-scale networks
Solution Approach 2:
The system enables self-service by allowing the TE LSP establishment process to automatically carry and configure tenant or service attributes through the signaling protocol exchange between ingress and egress nodes, without requiring external manual intervention for attribute configuration
2Reliability
If a binding relationship between tenant or service and TE LSP is established, then the TE LSP can be dedicated to specific tenant or service, but the binding becomes difficult to change and cannot meet dynamic adjustment scenarios
Solution Approach 1:
The patent implements dynamics by allowing the owner-related information in the Path message to be dynamically updated and re-bound during TE LSP establishment or modification. The egress node can determine and update the binding relationship between tenant/service and TE LSP based on the carried attributes, enabling flexible reconfiguration without permanent fixed bindings
Solution Approach 2:
The system applies parameter changes by allowing owner-related attributes to be modified in the Path message to reflect changes in tenant or service ownership. This enables the binding relationship to be dynamically adjusted by changing the attribute parameters carried in the signaling messages
3Ease of operation
If TE LSP is established without owner-related information, then the establishment process is simple, but filtering and management based on tenant or service cannot be implemented
Solution Approach 1:
The patent merges the TE LSP establishment process with the configuration of owner-related attributes by carrying tenant or service information directly in the Path message. This combination allows the establishment to remain simple while simultaneously enabling filtering and management capabilities through the integrated attribute information
Data Source
AI summary
A method, a device, and a system establish a traffic engineering label switched path, which can implement effective isolation between tenants or between services, to ensure security of tenant topology information or service topology information. The method includes: receiving, by an egress node, a resource reservation protocol-traffic engineering RSVP-TE-based Path message sent by an ingress node; determining, by the egress node, whether identification information of a TE LSP and owner-related information corresponding to the TE LSP are stored; and if it is determined that the identification information of the TE LSP and the owner-related information corresponding to the TE LSP are not stored, storing, by the egress node, a correspondence between the identification information of the TE LSP and the owner-related information, and sending an RSVP-TE-based resource reservation Resv message to the ingress node. The present application is applicable to the field of communications.