DHCP6

I am running m0n0wall 1.8.1 for generic PC(serial console).  I have a 
dynamic home Comcast install.  I can get an IPv6 address on the WAN 
interface using DHCP.  I set the LAN to DHCPD and get a /64 from 
Comcast.  So far, so good.

I can not figure out the proper settings for these on the LAN interface 
page.

Flags:  None, Managed, Other    Not sure what to use here for sure.

If I want to setup DHCPv6 on m0n0wall, what would I input in the IPv6 
Range when I have a dynamic IPv6 connection(if anything)?

Just a bit confused on a couple of minor points.  I found some of this 
documented online but the details were a bit sketchy for me to 
understand what I need here.

Thanks,
Lyle Giese
LCR Computer Services, Inc.