Two-Phase Packet Parser With Loopback for Tunneling Protocols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication devices face inefficiencies in processing packets with tunneling protocols due to increased load on the central processing unit when packet sizes exceed the parsing capacity of the packet parser, leading to reduced overall system efficiency.
Innovation Solution
A communication device employing a two-phase packet parsing method using a first parser circuit to parse tunneling protocol data and a second parser circuit to parse Ethernet protocol data, with a forwarding circuit to manage packet forwarding and utilize a loopback unit for multiple rounds of parsing when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the packet parser parses packets with tunneling protocols, then the parsing capacity is exceeded and CPU load increases, but system efficiency decreases
Solution Approach 1:
The packet parsing function is segmented into two independent parser circuits: a first parser circuit that parses packets based on tunneling protocols, and a second parser circuit that parses packets based on Ethernet protocols. This segmentation allows simultaneous processing of different packet types without overwhelming the CPU, resolving the contradiction between maintaining parsing capacity and preserving system efficiency.
2Reliability
If the packet size exceeds parsing capacity, then CPU intervention is required, but processing time increases
Solution Approach 1:
A forwarding circuit acts as an intermediary between the packet parser and the CPU. When a packet exceeds parsing capacity, the forwarding circuit automatically forwards it to the CPU without requiring CPU intervention for every packet, thereby reducing processing time while maintaining reliable parsing capacity for normal packets.
3Productivity
If multiple parser circuits are used, then parsing efficiency improves, but device complexity increases
Solution Approach 1:
The forwarding circuit is designed with multi-functionality, serving both as a packet forwarder for normal packets and as a router for oversized packets to the CPU. This universal component reduces device complexity by consolidating multiple functions into a single circuit rather than requiring separate dedicated circuits for each function.
Data Source
AI summary
A communication device includes a first parser circuit, a second parser circuit, and a forwarding circuit. The first parser circuit is configured to parse first data in a packet based on a tunneling protocol to obtain first parsing information and an offset value. The second parser circuit is configured to parse second data in the packet according to the offset value to obtain second parsing information, in which the offset value is utilized to indicate a starting position of the second data in the packet. The forwarding circuit is configured to forward the packet according to the first parsing information and the second parsing information.