Marriage Sunni Boy With Ismaili Girl
Sect is nothing. it is the religion that matters. If religion is a concern of the person, he would have considered it while marrying a person, if it is not his or her concern, he will not bother who to marry. Ismailis are Muslims as per their claim. We have no authority to declare kafir the one who claims to be a Muslim. Refer to the following video. https://www.youtube.com/watch?v=ZoQnYvp-HW8