Really nasty Solaris 11 install

I just installed two VMs with the Solaris 11 express (snv_151a) and when I turned off nwam, one worked and the second did not:

svcadm disable svc:/network/physical:nwam
svcadm enable svc:/network/physical:default

The network would come up, both ifconfig and netstat -rn showed reasonable values, but the machine would only ping iff nwam were turned on.

It turned out to be ipfiltering:

root@snarf:~# ping
ping: sendto Network is unreachable
root@snarf:~# ipfstat -io
block out log all
pass out quick on lo0 all
pass out quick proto udp from any to any port = bootps
block in log all
pass in quick on lo0 all
pass in quick proto udp from any to any port = bootpc
root@snarf:~# svcadm disable svc:/network/ipfilter
root@snarf:~# ping is alive
root@snarf:~# ipfstat -io
empty list for ipfilter(out)
empty list for ipfilter(in)

It was not enabled on the first machine, but was on the second. I have no clue what I did differently in the first install.