IPv6 on WSL2

Create .wslconfig in user home directory (%userprofile%) and add following.

[wsl2]
networkingMode=mirrored

If file already exists, update it.

Each network interface will be ethx

$ 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: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:01 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:02 brd ff:ff:ff:ff:ff:ff
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:00:00:00:00:03 brd ff:ff:ff:ff:ff:ff
    inet 192.0.2.100/24 brd 192.0.2.255 scope global noprefixroute eth2
       valid_lft forever preferred_lft forever
    inet6 2001:0DB8:0000:0000:0000:0000:0000:0000/128 scope global nodad noprefixroute
       valid_lft forever preferred_lft forever
    inet6 2001:0DB8:0001:0000:0000:0000:0000:0000/64 scope global nodad deprecated noprefixroute
       valid_lft forever preferred_lft 0sec
    inet6 fe80::0000:0000:0000:0000:0000/64 scope link nodad noprefixroute
       valid_lft forever preferred_lft forever
5: loopback0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff