CGA4332 Static IPv6

@Comcast_Marcus​ My ultimate goal is to be able to assign a static prefix to my internal network and not have it change randomly. Whether that's accomplished by assigning a static prefix to my internal network and a static route on the modem, by the modem listening for announcements, or any other method is fine by me. But my internal router apparently does not and probably will not support a PD ID, nor specifying the network portion of the prefix I want assigned.

Thanks for the reply.

thetommyc, No problem at all, you know I have seen something along the lines of the same issue you are referencing elsewhere in the forum. Have you had a chance to try this workaround?

My router doesn't allow me to set a DUID manually, so if it adds some amount of randomness to the DUID value, then all bets are off. Currently my router's public address is received via SLAAC, and then PD for a /59 for the internal networks. Is the official guidance to use DHCPv6 for my router's public IP? That may get a consistent address for the Comcast modem side of my router, but I don't think that answers the issue of receiving a consistent prefix for my internal network. Am I incorrect there? Will the Comcast modem issue the same prefix to my router if I use DHCPv6 for the outside interface?

With the internal network, @thetommyc, have you attempted to use a different type of router to see if that helps? 

I'm certain some routers allow PD ID values to be specified, but mine doesn't. So a simple work around to the fact that Comcast appears to require announcements to add routes to the Comcast modem dynamically, allowing static routes to be added to the v6 network would fix this for everyone. There's already a provision for v4, so I'm not sure why there isn't one exposed for v6.