How do I disable IPv6, which got installed DHCP by default?

I'm showing two net0 interfaces, one IPv4 and one IPv6. I've tried using netcfg to clear ipv6-addrsrc and got told it's read-only. I tried ipadm and all I was able to do was partially corrupt the IP address, not delete the interface.

I think this is done by:
# ipadm show-addr
ADDROBJ TYPE STATE ADDR
lo0/v4 static ok 127.0.0.1/8
aggr0/v4 static ok 10.0.0.10/24
lo0/v6 static ok ::1/128
# ipadm delete-addr lo0/v6
# ipadm show-addr
ADDROBJ TYPE STATE ADDR
lo0/v4 static ok 127.0.0.1/8
aggr0/v4 static ok 10.0.0.10/24
Then unplumb the interface using what you posted ..
# ifconfig lo0 inet6 unplumb

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