Hi Keith,

> This is interesting to me. I am using connman and iwd (1.10) and have ipv6

If you're using connman, then this discussion isn't really relevant for you.
You should let connman manage IPv4/IPv6 details.

> enabled on my home network. On my RPi, the ipv6 addresses are listed:
> The /etc/iwd/main.conf lists only:
> [General]
> UseDefaultInterface=true
> NameResolvingService=resolvconf

In fact, this setting is useless without EnableNetworkConfiguration=True.  And
you should NOT set it if you're using connman.  EnableNetworkConfiguration and
NameResolvingService are only needed if you're running iwd standalone or do not
want to use an external network manager, like NM/connman/networkd, for managing
wifi connections.

>
> There is nothing referencing ipv6 in connman's main.conf nor in the psk for the
> AP I am using.  Yet, I get these addresses when iwd negotiates the connection:
>
> wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>          inet 192.168.2.41  netmask 255.255.255.0  broadcast 192.168.2.255
>          inet6 fd21:98c8:1d28:0:ba27:xxff:fexx:xxxx  prefixlen 64  scopeid
> 0x0<global>
>          inet6 fd21:98c8:1d28::41  prefixlen 64  scopeid 0x0<global>
>          inet6 2600:1700:4320:6caf:ba27:xxff:fexx:xxxx  prefixlen 64  scopeid
> 0x0<global>
>          inet6 fe80::ba27:xxff:fexx:xxxx  prefixlen 64  scopeid 0x20<link>
>          ether b8:27:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
>          RX packets 11056898  bytes 8907204479 (8.2 GiB)
>          RX errors 0  dropped 0  overruns 0  frame 0
>          TX packets 3810279  bytes 415445265 (396.1 MiB)
>          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> How should I disable it? Should I?

That is a question for the connman mailing list.  iwd isn't doing any network
configuration in your case.

Regards,
-Denis