After enable ipv6 in the docker, it works for only static ipv6 address, but not DHCP ipv6 address

[WallaceSUI]

Warning
libnetwork was moved to https://github.com/moby/moby/tree/master/libnetwork

libnetwork has been merged to the main repo of Moby since Docker 22.06.

The old libnetwork repo (https://github.com/moby/libnetwork) now only accepts PR for Docker 20.10,
and will be archived after the EOL of Docker 20.10.

Sorry to trouble all of you.
Recently, I follow the guidance to enable ipv6 for the docker in my linux machine

I directly edit the /etc/docker/daemon.json file for adding these parameters:
"ipv6": true,
"ip6tables": true,
"experimental": true,
"fixed-cidr-v6": "2001:db8:abc1::/64"
Then just restart the docker.

Then for example, here are two ipv6 addresses
static ipv6 address A
DHCP(dynamic) generated ipv6 address B

Case1:
When I use "ping6 A" in my linux machine, it works with response

Case2:
When I use "ping6 B" in my linux machine, it works but should have a zone identifier behind, like "B%eth0"

Case3:
when I use "docker exec -it myDocker bash" to get inside a docker, and then run "ping6 A", it works with response

Case4:
when I use "docker exec -it myDocker bash" to get inside a docker, and then run "ping6 B", it always throws the error message "ping6: sendto: Invalid argument"
Then I also try "ping6 B%eth0", it will be time out without any response.

For case4, I do not understand, for DHCP generated ipv6 address, why we cannot use it or ping6 it inside the docker? Why the docker cannot automatically assign a zone identifier to it? what is the problem here? how to fix it?

Thanks a lot. Really need your help.

[kapiteined]

Hi, could you please send the output of ip -f inet6 addr show From within the container and from the host? Also, there is/was a problem with a /64, can you try again with a /80 ? Kind regards, Ed

…

On 3/24/23 09:52, Haochen Sui wrote: *Warning* libnetwork was moved to https://github.com/moby/moby/tree/master/libnetwork libnetwork has been merged to the main repo of Moby since Docker 22.06. The old libnetwork repo (https://github.com/moby/libnetwork) now only accepts PR for Docker 20.10, and will be archived after the EOL of Docker 20.10. Sorry to trouble all of you. Recently, I follow the guidance to enable ipv6 for the docker in my linux machine I directly edit the /etc/docker/daemon.json file for adding these parameters: "ipv6": true, "ip6tables": true, "experimental": true, "fixed-cidr-v6": "2001:db8:abc1::/64" Then just restart the docker. Then for example, here are two ipv6 addresses static ipv6 address A DHCP(dynamic) generated ipv6 address B Case1: When I use "ping6 A" in my linux machine, it works with response Case2: When I use "ping6 B" in my linux machine, it works but should have a zone identifier behind, like "B%eth0" Case3: when I use "docker exec -it myDocker bash" to get inside a docker, and then run "ping6 A", it works with response Case4: when I use "docker exec -it myDocker bash" to get inside a docker, and then run "ping6 B", it always throws the error message "ping6: sendto: Invalid argument" Then I also try "ping6 B%eth0", it will be time out without any response. For case4, I do not understand, for DHCP generated ipv6 address, why we cannot use it or ping6 it inside the docker? Why the docker cannot automatically assign a zone identifier to it? what is the problem here? how to fix it? Thanks a lot. Really need your help. — Reply to this email directly, view it on GitHub <#2675>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABPTWE4UTWU3YOEKML72E73W5VOGHANCNFSM6AAAAAAWGIS3KQ>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>