Traefik's external ip

Hi ,

We are using traefik as ingress controller. Currently we are deploying it with only ipv4 ip address.

In future to support ipv6 along with ipv4 as external ip address what should i do?
We are using k3s 1.19.1.

When i try to "kubectl edit svc traefik -n kube-system" in the external ip address's field with an ipv6 along with ipv4 ,i get the error that it has to be a valid ip address and gives me a sample ipv4 address