Cannot connect to services using ipv6 addresses

[Xi Shen]

Hi,

I installed metallb into my k3s cluster and have configured an IpAddressPool with both ipv4 and ipv6 address pools. After I deployed my service, the service got both ipv4 and ipv6 addresses. However, I can only access that service using its ipv4 address.

I connected to the pod console and tested it with curl:

curl -6 'http://[::1]'

It worked. So, I think the service is listening on the ipv6 address.

So far, I am not sure if it is my network router that cannot route ipv6 traffic correctly, or metallb did not allocate the ipv6 address correctly. What should I do to troubleshoot?

Thanks