Can't start eth1 and dhcp on debian wheezy

iface eth1 inet static
        adress 192.168.7.2
          ^^^ typo here, should be "address".

Also note that ifconfig is deprecated since 1999, use ip addr instead (ifupdown is not deprected through).

ifupdown has this little problem that it cannot detect "invalid" options because these options are passed as environment variables and there is no way to tell if a ifupdown helper script uses a certain environment variable. In theory, there could be a ifupdown helper script that uses an option called "adress", and it would be perfectly valid. An improvement would require that existing helpers list the options they accept, so would break many existing scripts.