Dhcp route pushing

Documentation about Advanced DHCP Options: Pushing static routes to clients

dhcp-option 33 (dhcp push single route) works on windows. Does not work on linux.

dhcp-option 121 (dhcp classless route) works on both windows and linux.

Android behaves differently: cyanogenmod 4.1 understands option 33, while 4.2 not. Neither of the two got the 121 option.