Scenarios
If you use UDP as the frontend protocol, you can select QUIC as the backend protocol. QUIC has the advantages of low latency, high reliability, and no head-of-line blocking (HOL blocking), and is very suitable for the mobile Internet. No new connections need to be established when you switch between a Wi-Fi and a mobile data network.
- QUIC versions include Q043, Q046, and Q050.
- UDP listeners using QUIC as backend protocol do not support fragmentation.
Constraints and Limitations
- Only dedicated load balancers support the QUIC protocol.
- You can add only UDP listeners if you want to use QUIC as the backend protocol.
Adding a UDP Listener with a QUIC Backend Server Group Associated
- Log in to the management console.
- In the upper left corner of the page, click
and select the desired region and project. - Hover on
in the upper left corner to display Service List and choose Network > Elastic Load Balancing. - Locate the load balancer and click its name.
Select Network load balancing (TCP/UDP) and select a specification for the load balancer.
- Under Listeners, click Add Listener.
- In the Configure Listener step, set Frontend Protocol to UDP, configure other parameters based on the site requirements, and click Next.
- In the Configure Routing Policy step, set Backend Protocol to QUIC and configure other parameters as required.
- Configure the parameters and click Submit.
Follow-Up Operations
After you add a listener, associate backend servers with the listener by performing the operations in Adding or Removing Backend Servers (Dedicated Load Balancers).