IPv6 Stateless Configuration

Hi, First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM. Thanks! Rod Bio.