In enterprise networks, real-time services such as voice calls, video conferencing, and industrial IoT devices have extremely high requirements for network stability and low latency. Newbridge PoE switches (such as ND-AHP2422G AI PoE Switch) can accurately allocate network resources through QoS (Quality of Service) configuration, ensure priority transmission of critical traffic, and ensure the stability of PoE power supply. This article combines industry standards and Newbridge device features to provide you with a complete set of QoS configuration guides to help content accurately reach target users in search engines.
1. QoS Basics: Traffic Classification and Priority Strategy
1. Traffic Classification Logic
The core of QoS lies in traffic identification and priority division. Newbridge PoE switches support the following classification methods:
Port-based: Assign fixed priorities to specific ports connected to IP phones and cameras.
Protocol-based: Identify HTTP, SIP, RTP and other protocol traffic through ACL (Access Control List).
Based on DSCP/802.1p marking: cooperate with upstream devices and inherit the marked priority tag.
2. Priority queue configuration
Newbridge switches support SP (strict priority) + WRR (weighted round robin) hybrid queues:
SP queue: assign the highest priority to real-time traffic such as voice and video to ensure zero packet loss.
WRR queue: allocate the remaining bandwidth to data services according to weight (such as 1:2:3) to avoid congestion.
Configuration path: Web management interface → QoS settings → Queue scheduling policy → Define queue type and weight.
2. Collaborative optimization of PoE power supply and QoS
1. Power priority management
Newbridge PoE switches support port power supply priority configuration (such as ND-P0420-AI model):
Assign "high priority" to key devices (such as access controllers) in PoE settings, and give priority to their power supply when the total power is insufficient.
Combined with QoS traffic priority, "power supply + bandwidth" dual protection is achieved to avoid communication interruption of devices due to power fluctuations.
2. Dynamic power adjustment
Through the intelligent power management function, the switch can monitor the port load in real time:
When the power of a port exceeds the limit, it automatically reduces the power supply level of non-critical devices (such as ordinary IP cameras), and at the same time increases its traffic priority to "best effort" to balance resource allocation.
3. Configuration steps: from basic to advanced
1. Basic configuration: port priority binding
Step 1: Log in to the Web management interface (default IP: 192.168.1.1), enter QoS → Port priority.
Step 2: Select the port connected to the IP phone, set the priority to 7 (highest), and check "Inherit PoE power supply priority".
Step 3: Assign priority 4 to ordinary data ports to ensure stable daily office traffic.
2. Advanced configuration: protocol-based traffic shaping
Step 1: Create entries in the ACL rules to match the SIP protocol (port 5060) and RTP protocol (port 10000-20000).
Step 2: Enter QoS policy, classify the above traffic into SP queue, and enable traffic policing (such as limiting single-channel voice traffic to 1Mbps).
Step 3: Apply WRR queue to HTTP/HTTPS traffic, set the weight to 2, and configure traffic shaping (burst traffic limit to 5Mbps).
3. Cross-device collaboration: DSCP marking transmission
Enable DSCP trust mode in QoS global settings so that the switch retains the DSCP value marked by the upstream device (such as router).
Automatically add the default DSCP value (such as AF41) to unmarked traffic to ensure that downstream devices (such as servers) correctly identify the priority.
4. Performance monitoring and policy verification
1. Real-time traffic statistics
Newbridge switches support port traffic monitoring and queue utilization analysis:
In the monitoring → QoS statistics of the web interface, view the bandwidth usage, packet loss rate and power supply status of each queue.
Set threshold alarms (such as triggering email notifications when queue utilization exceeds 80%) to detect congestion risks in a timely manner.
2. Stress testing and policy optimization
Use the Iperf tool to simulate multi-threaded downloads and initiate a video conference stream at the same time to verify the effectiveness of the QoS policy.
If the voice delay is found to exceed the standard, the SP queue bandwidth can be fine-tuned (such as from 20% to 30%) and retested.
5. Newbridge Features and Official Resources
1. AI Intelligent Optimization
ND-AHP2422G and other models support AI traffic prediction:
Analyze historical traffic data through machine learning and automatically adjust QoS policies to adapt to dynamic scenarios such as office peaks and video conferences.
Combined with the PoE Watchdog function, when the device communication is interrupted, the port is automatically restarted to restore the network connection.
2. Official Technical Support
Newbridge official website (www.cnnewbridge.com) provides:
Product manual: Contains detailed steps and parameter recommendations for QoS configuration (such as the PoE priority setting guide for ND-P0420-AI).
Case Library: Practical application cases of QoS and PoE collaborative optimization in scenarios such as security monitoring and smart campuses.
Firmware update: Regularly optimize QoS algorithms to improve stability when multiple services are running concurrently.