Please forgive my ignorance of networking for this question.  I plan to connect the S33 to my EdgeRouter-4 and will use Xfinity as the ISP.  When I first attempted this (which I am certain I did not do correctly), the modem had an IPv6 address assigned to it.  My EdgeRouter-4 is currently setup to only work with IPv4.  If I activate the modem (correctly, this time) is it capable of receiving an IPv4 address from Xfinity, or do I need to adjust something in my router setup to accommodate an IPv6 address from Xfinity?

Thanks.