Internal Switch DHCP

Hi

    I have a host machine (Sever 2012 R2) and I have installed a VM (Win 8.1) The host has AD, DNS and DHCP as well as Hyper V Role. I have set up an internal switch and connected both virtual interfaces to it - host and VM. The VM does not get a DHCP address from the host. Satic IP's work fine. Can this be done - host supply VM with an DHCP address ?

Thanks

Howard