YD/T 4474-2023
Access-type OTN controller southbound interface test method (English Version)

Standard No.: YD/T 4474-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: Professional Standard - Post and Telecommunication CN / YD
Latest: YD/T 4474-2023

Introduction

Standard Background and Technology Evolution

With the development of 5G and cloud network integration, the application of access OTN equipment at the edge of the metropolitan area has shown explosive growth. This standard specifies the unified management and control interface of plug-in access OTN and box access OTN equipment for the first time, marking a key breakthrough in the transformation of optical access networks from traditional network management mode to SDN controller architecture.

Comparison of core test frameworks

Test dimensions	Protocol test	Function test	Performance test
Test focus	NETCONF connection establishment	Service configuration integrity	Latency/packet loss rate
Key indicators	DHCP Relay success rate ≥ 99.9%	Service creation delay ≤ 3s	Measurement accuracy ±1μs
Test tools	Data network analyzer	Business simulation instrument	High-precision timestamp instrument

Key technology analysis

1. Automatic online mechanism

The standard requires that the device implements three-layer automatic addressing through the GCC2 overhead channel. The test case shows that: when the DCN network is abnormal, the Huawei OSN 1800V device can maintain control channel connectivity through preset static routes.

2. Lossless adjustment of services

In the ETH service bandwidth modification test, the ZTE ZXMP M721 device uses the LCAS protocol to achieve the following:

Zero service interruption when adjusting from 500M to 800M
Time slot increase and decrease delay is controlled within 50ms

Implementation suggestions

Test environment establishment: It is recommended to use Spirent TestCenter to simulate metropolitan OTN equipment to ensure that the DCN network delay is ≤5ms
Exception handling: For the alarm storm scenario in Article 7.5.2, the maximum number of alarms per second should be configured to not exceed 100
Security reinforcement: NETCONF sessions must enable TLS1.2 encryption, and password modification operations require secondary authentication