Restoring Original TE-LSP Attributes Across Domains
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Solution Overview
Problem
Existing technologies face challenges in dynamically restoring original attributes of Traffic Engineering Label Switched Paths (TE-LSPs) across multiple domains, particularly when intermediate domains translate these attributes, leading to cumbersome and error-prone manual configuration during dynamic configuration or resizing of TE-LSPs.
Innovation Solution
A technique that uses RSVP signaling extensions, including new objects and flags, to request and restore original TE-LSP attributes across intermediate domains, ensuring that the attributes are preserved and restored correctly at the destination domain, eliminating the need for manual configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual configuration is used to restore TE-LSP attributes, then attribute restoration can be achieved, but the process becomes cumbersome and error-prone
Solution Approach 1:
The system automatically restores TE-LSP attributes by having the destination domain router retrieve and apply the original source domain attributes through signaling protocols, eliminating the need for manual configuration intervention while ensuring accurate attribute restoration
Solution Approach 2:
The signaling protocol establishes a feedback mechanism where the destination domain router receives information about the original TE-LSP attributes from the source domain and automatically applies them, creating a closed-loop system that ensures attribute consistency without manual intervention
2Adaptability or versatility
If intermediate domains translate TE-LSP attributes, then domain compatibility is improved, but the original attributes are lost
Solution Approach 1:
The signaling protocol acts as an intermediary that carries the original TE-LSP attributes through the intermediate domains without requiring them to interpret or translate these specific attributes, allowing both attribute translation for compatibility and original attribute preservation simultaneously
Solution Approach 2:
The attribute handling is segmented into two separate functions: one for translating attributes to ensure domain compatibility, and another for preserving and restoring the original attributes, allowing both requirements to be met independently
Data Source
AI summary
A technique dynamically restores original attributes of a Traffic Engineering Label Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.