This is possible to run the two address-families under the same OSPF process since Cisco IOS Software Release 15.1(3)S.
You can do this as :
R9(config)# ipv6 unicast-routing
R9(config)# ipv6 cef
Then :
R9(config)# router ospfv3 1
R9(config-router)#address-family ipv4 unicast
R9(config-router-af)#router-id 10.1.9.9
R9(config-router-af)#redistribute connected
R9(config-router-af)#exit-a
And then configure the OSPF link by means of configuration on the interface :
R9(config-router-af)#int ser 3/0
R9(config-if)#ospfv3 1 ipv4 area 236
*May 13 20:31:14.956: %OSPFv3-5-ADJCHG: Process 1, IPv4, Nbr 10.1.6.6 on Serial3/0 from LOADING to FULL, Loading Done
R9(config-if)#ospfv3 1 ipv6 area 236
R9(config-if)#
This is where I think it is really powerful.
I recommend you to check IPv6 and OSPF only with the keyword “ospfv3” such as :
R9#show ospfv3 neighbor
OSPFv3 1 address-family ipv4 (router-id 10.1.9.9)
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.6.6 0 FULL/ - 00:00:33 15 Serial3/0
OSPFv3 1 address-family ipv6 (router-id 20.1.9.9)
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.6.6 0 FULL/ - 00:00:31 15 Serial3/0
R9#
On R6 we can see now :
6#show ip route ospf?
Hostname or A.B.C.D ospf ospfv3
R6#show ip route ospfv3
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 11 subnets, 2 masks
O E2 10.1.9.9/32 [110/20] via 10.1.69.9, 00:04:16, Serial3/0
20.0.0.0/32 is subnetted, 2 subnets
O E2 20.1.9.9 [110/20] via 10.1.69.9, 00:04:16, Serial3/0
R6#