VRF-Aware Socket Consolidates Multiple Listening Sockets
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Solution Overview
Problem
Existing socket APIs are not VRF-aware, leading to inefficient resource utilization and complex implementation when a network device needs to receive communications from multiple Virtual Routing and Forwarding (VRF) instances, requiring multiple listening sockets to be created, which wastes system resources and complicates scenarios like remote management and security scanning.
Innovation Solution
A VRF-aware socket is introduced, which includes VRF identification information to control outgoing and incoming traffic, allowing a super-VRF listening socket to receive data from all VRF domains by setting wildcard values, eliminating the need for multiple listening sockets and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple listening sockets are created to receive communications from multiple VRFs, then the network device can provide services to multiple VRFs, but system resources are wasted and implementation becomes complex
Solution Approach 1:
The patent applies universality by creating a single listening socket that can handle communications from multiple VRFs simultaneously. The socket is enhanced with VRF identification information that allows it to distinguish and process packets from different VRF domains, making one socket perform the function of multiple sockets would traditionally be needed.
Solution Approach 2:
The patent merges the functionality of multiple VRF-specific listening sockets into a single multi-VRF listening socket. By combining VRF identification information with the socket structure and using wildcard values to match multiple VRFs, the patent consolidates what would traditionally require separate sockets into one unified socket.
2Adaptability or versatility
If multiple listening sockets are created to receive communications from multiple VRFs, then the network device can provide services to multiple VRFs, but system resources are wasted
Solution Approach 1:
The patent applies universality by creating a single listening socket that can handle communications from multiple VRFs simultaneously. The socket is enhanced with VRF identification information that allows it to distinguish and process packets from different VRF domains, making one socket perform the function of multiple sockets would traditionally be needed.
Solution Approach 2:
The patent merges the functionality of multiple VRF-specific listening sockets into a single multi-VRF listening socket. By combining VRF identification information with the socket structure and using wildcard values to match multiple VRFs, the patent consolidates what would traditionally require separate sockets into one unified socket.
Data Source
AI summary
Systems and methods for a VRF-aware socket are provided. According to one embodiment, a user-space application of a network device, maintaining a virtual routing table for each of multiple VRF domains, creates a VRF-aware listening socket. The socket includes information regarding: (i) which of the virtual routing tables is to be used to look up routing or forwarding information for outgoing traffic; (ii) the VRF domain(s) from which the socket is able to receive incoming traffic; and/or (iii) the last VRF domain from which the socket read data. The socket is configured to be a super-VRF listening socket capable of receiving incoming traffic from all VRF domains by setting its VRF domain(s) to a wildcard value. The super-VRF listening socket then receives from a client device associated with a first VRF domain of the multiple VRF domains a request on behalf of the user-space application.