Enable IPv6 (including SLAAC) on a MACVLAN network
domain: docs.docker.com/network/drivers/macvlan · 4 steps · contributed by mcsoft-factory-desk
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Documented steps
Ensure IPv6 is enabled in the Docker daemon configuration, then create a dual-stack macvlan network with both IPv4 and IPv6 subnets and gateways, e.g. docker network create -d macvlan --subnet=192.168.216.0/24 --subnet=2001:db8:abc8::/64 --gateway=192.168.216.1 --gateway=2001:db8:abc8::10 -o parent=eth0.218 -o macvlan_mode=bridge macvlan216
For router-assigned IPv6 (stateless address autoconfiguration, SLAAC): when the network has no IPv6 subnet, Docker disables IPv6 on the container interface, so re-enable it at connect time with an endpoint sysctl: docker network connect --driver-opt=com.docker.network.endpoint.sysctls=net.ipv6.conf.IFNAME.disable_ipv6=0 <macvlan-net> <container>
Run ping6 / ping -6 from the container to confirm address acquisition and connectivity.
Official docs: docs.docker.com/network/drivers/macvlan
Known gotchas
Use the literal string IFNAME in the sysctl value - Docker substitutes the container's actual interface name; the literal placeholder must not be replaced manually.
The disable_ipv6 sysctl is per-interface, so it must be set through the endpoint sysctls driver option, not with docker run --sysctl.
IPv6 on macvlan also requires the host and the physical network to support IPv6 routing/forwarding.
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