[Podman] Error: netavark: failed configure macvlan: IO error: failed to add route: Invalid argument (os error 22)

Hello, I would like to create rootful containers with static IPv4 and IPv6 addresses that are part of my network (containers that somehow act as physical devices on my network). From what I understand in the documentation [1], the macvlan driver should be my preferred option with netavark. [1] https://github.com/containers/podman/blob/main/docs/tutorials/basic_netwo... My problem is that I get an error when starting a container attached to a macvlan network created with an IPv6 subnet: FYI, as long as the maclan network is created without IPv6 subnet, I can create new podman containers without error. [root@fedora-server ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:fd:e8:df brd ff:ff:ff:ff:ff:ff inet 192.168.122.2/24 brd 192.168.122.255 scope global dynamic noprefixroute enp1s0 valid_lft 2219sec preferred_lft 2219sec inet6 fe80::5054:ff:fefd:e8df/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@fedora-server ~]# [root@fedora-server ~]# ip r default via 192.168.122.1 dev enp1s0 proto dhcp src 192.168.122.2 metric 100 192.168.122.0/24 dev enp1s0 proto kernel scope link src 192.168.122.2 metric 100 [root@fedora-server ~]# [root@fedora-server ~]# podman info |grep -i networkbackend networkBackend: netavark [root@fedora-server ~]# [root@fedora-server ~]# podman network create \ --driver macvlan \ --opt=parent=enp1s0 \ --subnet 192.168.122.0/24 \ --gateway 192.168.122.1 \ --subnet fe80::/112 \ mynetwork mynetwork [root@fedora-server ~]# [root@fedora-server ~]# podman run -it --rm \ --ip=192.168.122.97 \ --ip6=fe80::97 \ --network=mynetwork \ registry.fedoraproject.org/fedora:latest bash Error: netavark: failed configure macvlan: IO error: failed to add route: Invalid argument (os error 22) [root@fedora-server ~]# [root@fedora-server ~]# podman run -it --rm \ --ip=192.168.122.97 \ --network=mynetwork \ registry.fedoraproject.org/fedora:latest bash Error: netavark: failed configure macvlan: IO error: failed to add route: Invalid argument (os error 22) I don't know what I'm doing wrong. Maybe I'm missing something important from the documentation. Any help will be appreciated. Thanks. -- Laurent Meunier <laurent(a)deltalima.net&gt;