OAM Packet Processing via IP Header Carrying for Fault Detection
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Solution Overview
Problem
Existing OAM methods in networks fail to detect faults consistently due to different forwarding entries used for service and OAM packets, leading to incomplete fault detection in traditional network devices.
Innovation Solution
The method involves using an IP packet header to carry OAM information without special Ethernet protocol types or destination MAC addresses, ensuring identical forwarding entries are used for OAM and service packets, allowing for simultaneous fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special Ethernet protocol types and destination MAC addresses are used for OAM packets, then OAM detection can be implemented, but different forwarding entries are used for service and OAM packets, causing incomplete fault detection
Solution Approach 1:
The patent merges the forwarding treatment of OAM packets and service packets by removing special Ethernet protocol types and destination MAC addresses from OAM packets, making them use identical forwarding entries with service packets, thus ensuring consistent forwarding paths for both packet types and enabling complete fault detection
Solution Approach 2:
The patent makes OAM packets use the same forwarding mechanism as service packets, allowing the forwarding entries to serve both OAM and service packet routing purposes, thereby achieving universal forwarding treatment and ensuring that faults affecting service packets are also detected by OAM packets
Data Source
AI summary
An operations, administration, and maintenance (OAM) packet processing method, a network device, and a network system are provided. The method includes receiving a first Internet Protocol (IP) packet, where the first IP packet includes an OAM packet, an IP packet header of the OAM packet includes a first source device identifier (ID) and a first sink device ID, and returning a second IP packet to reply to the OAM packet, where the second IP packet includes an OAM reply packet, an IP packet header of the OAM reply packet includes a second source device ID, a second sink device ID, and a second packet type, the second source device ID is an ID of a local network device, and the second sink device ID is the same as the first source device ID. An IP packet header may be used to carry OAM information, which improves a fault detection capability in an OAM method.