Tencent Cloud CDN IPv6 Architecture and Configuration Guide

The article introduces the IPv6 architecture of Tencent Cloud CDN and provides a step‑by‑step tutorial on how to enable IPv6 acceleration for a domain, configure the IPv6 origin server, and verify IPv6 back‑to‑origin and public IPv6 access.

1. IPv6 Architecture Design – Tencent Cloud CDN offers a smooth and secure IPv6 entry point, allowing customers to gradually migrate from IPv4 to IPv6 while supporting dual‑stack operation. The architecture diagram (illustrated in the original article) shows how CDN edge nodes handle IPv6 requests and forward them to the origin.

2. Detailed Operation Steps

2.1 Add and Configure an Accelerated Domain – Log in to the CDN console, go to “Domain Management”, click “Add Domain”, select the project, choose “Self‑owned origin”, check the IPv6 option, and enter a valid IPv6 address for the origin. After the domain status becomes “Enabled”, the domain is live.

2.2 Test and Add a CNAME Record – The CDN CNAME format is accelerated-domain.cdn.dnsv1.com . Use the dig AAAA accelerated-domain command to verify that the AAAA record resolves to the CDN’s IPv6 edge node. Then, in the DNS console, add a CNAME record with the appropriate host (e.g., www), type CNAME, value accelerated-domain.cdn.dnsv1.com , and TTL 600 s.

2.3 Verify IPv6 Origin

• Check that the origin server has an IPv6 address: ifconfig | grep -i inet6

• Verify the server is listening on IPv6: netstat -tupln

• Test HTTP connectivity over IPv6: curl -6 -sv ip6-localhost/ipv6.txt

2.4 IPv6 Back‑to‑Origin and Edge Access – After the CNAME is resolved, client IPv6 requests are directed to CDN edge nodes, which cache and return content. Verify with: curl -sv -6 accelerated-domain

The guide notes that the IPv6 feature is currently in an internal testing phase and requires an application for trial use.

Finally, the article encourages readers to follow the “云加社区” public account for more IPv6 content.