show log | grep "IA_PD prefix:"
Aug 04 23:11:45 dhcp6c[2024]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
Aug 04 23:11:46 dhcp6c[2024]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
Aug 04 23:11:54 dhcp6c[2767]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
Aug 04 23:11:55 dhcp6c[2767]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
Aug 04 23:20:14 dhcp6c[4186]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
Aug 04 23:20:15 dhcp6c[4186]: copyin_option: IA_PD prefix: xxxx:xxxx:60d7:da00::/56 pltime=3600 vltime=3600
log shows i am getting a /56 but /64 on the LAN side, same as Gus, interesting. I guess this is resolved. thanks guys.