I'm trying to get my device to work when its taken out of the box the first time. When it tries to send a dhcp request, option 150 should be added along so that it'll get the tftp server address from which it should download the required configuration.

Now after reading the various documentation on this topic, it seems the right approach in openwrt is to add 'option sendopts <150>' in /etc/config/network. Is this the correct approach? Has anyone tried this earlier?