1. 13: OSPFv3
Rick Graziani
Cabrillo College

2. For more information please check out my Cisco Press book and video series:
IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6
By Rick Graziani
ISBN-10:
IPv6 Fundamentals LiveLessons: A Straightforward Approach to Understanding IPv6
By Rick Graziani
ISBN-10:

3. 13.1: Protocol and Concepts

4. IPv4 and IPv6 Routing Protocols
Exterior Gateway Protocols
Interior Gateway Protocols
Distance Vector
Link State
Path Vector
Distance Vector Routing Protocols
Link State Routing Protocols
Path Vector
RIPv2
EIGRP
OSPFv2
IS-IS
BGP-4
RIPng
EIGRP for IPv6
OSPFv3 *
IS-IS for IPv6
BGP-4 for IPv6 or
MP-BGP
IPv4
IPv6
* OSPFv3 supports routing both IPv4 and IPv6.
The basic operations and algorithms you learned about OSPFv2 for IPv4 also apply to OSPFv3 for IPv6.
BGP-4 Multiprotocol Extensions for IPv6
There are some changes, but the basics remain the same.

5. Comparing Flavors of OSPF
OSPFv2 for IPv4
Traditional
OSPFv3 for IPv6
OSPFv3 Address Families
OSPF version
OSPFv2
OSPFv3
Advertised routes
IPv4 networks
IPv6 prefixes
IPv4 networks and IPv6 prefixes
Link-state
Yes
Metric
Cost (Cisco: BW)
Support multiple areas
Router-ID
32-bit
DR and BDR
“Traditional OSPFv3”

6. OSPFv2 for IPv4
Traditional
OSPFv3 for IPv6
OSPFv3 Address Families
Layer 3 encapsulation
IPv4
IPv6
Source address
IPv4 address
IPv6 link-local address
Destination - All OSPF Routers
FF02::5
Destination – ALL DR/BDR
FF02::6
Destination - Neighbor
IPv6 Unicast Routing
N/A (IP unicast routing default)
Required
Required (Even if only using IPv4 address family)
Authentication
Plain text and MD5
IPsec
LSAs
OSPFv3 renames two LSA types and defines two additional LSA types that do not exist in OSPFv2.

7. Comparing OSPFv2 and OSPFv3 LSAs
Type
Name
LS Type Code 1
Router LSA
0x2001 2
Network LSA
0x2002 3
Network Summary LSA
0x2003
Inter-Area Prefix LSA 4
ASBR Summary LSA
0x2004
Inter-Area Router LSA 5
AS-External LSA
0x4005 6
Group Membership LSA
0x2006 7
NSSA External LSA
0x2007
Type-7 LSA
0x2008
Link LSA
0x2009
Intra-Area Prefix LSA
Note: Intra-Area Prefix LSA is a new LSA in OSPFv3 and used in order to advertise one or more IPv6 prefixes. In OSPFv2 the intera-area prefix information was carried in the router and network LSA's (Type 1 & 2).
OSPFv3 does also change the info that is carried in type 1 and type 2 LSAs. There is no IPv6 specific info in them which is different from OSPFv2
The LS type of an AS-external-LSA is set to the value 0x AS-
external-LSAs have AS flooding scope.
Link LSAs (Type 8)--Have local-link flooding scope and are never flooded beyond the link with which they are associated. Link LSAs provide the link-local address of the router to all other routers attached to the link, inform other routers attached to the link of a list of prefixes to associate with the link, and allow the router to assert a collection of Options bits to associate with the network LSA that will be originated for the link.
Intra-Area-Prefix LSAs (Type 9)--A router can originate multiple intra-area-prefix LSAs for each router or transit network, each with a unique link-state ID. The link-state ID for each intra-area-prefix LSA describes its association to either the router LSA or the network LSA and contains prefixes for stub and transit networks.

8. 13.2: OSPFv2 and Traditional OSPFv3

9. Comparing OSPFv2 and Traditional OSPFv3
IPv4
OSPFv2
OSPFv2
IPv4
Neighbor
Table
LSDB
Routing
Table
Neighbor
Table
LSDB
Routing
Table
IPv4 Network R1 R2
IPv6 Network
OSPFv3
OSPFv3
IPv6
OSPFv3
OSPFv3
IPv6 R2
Neighbor
Table
LSDB
Routing
Table
Neighbor
Table
LSDB
Routing
Table

10. Dual-stack Topology Area 0 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
Dual-stack Topology
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2# show ip interface brief
Interface IP-Address OK? Method Status Protocol
Serial0/0/ YES manual up up
Serial0/0/ YES manual up up
R2# show ipv6 interface brief
Serial0/0/ [up/up]
FE80::2
2001:DB8:CAFE:2::2
Serial0/0/ [up/up]
2001:DB8:CAFE:3::1
Note: Although perhaps uncommon, serial links are used in this topology to more easily differentiate from LANs.
Same link-local address
Statically configured
P = OSPF passive interface
R3 – not passive
Using IOS 15.4 on 1941s
/30 typical for point-to-point serial

11. OSPFv2 Configuration and Routes
2001:DB8:CAFE:1::/64
OSPFv2 Configuration and Routes
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
Static (Default)
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP
Default R1 R2 R3
/24
/24
/24
/24 R1
ip route
router ospf 1
router-id
passive-interface GigabitEthernet0/0
network area 0
network area 0
default-information originate R2
router ospf 1
router-id
interface Serial0/0/0
ip ospf 1 area 0
interface Serial0/0/1 R3
router ospf 1
router-id
passive-interface GigabitEth0/0
interface Gig 0/0
ip ospf 1 area 0
interface Serial0/0/1
Review of OSPFv2 configurations

12. OSPFv2 Configuration and Routes
2001:DB8:CAFE:1::/64
OSPFv2 Configuration and Routes
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ip route ospf
Gateway of last resort is to network
O*E /0 [110/1] via , 00:00:33, Serial0/0/1
O /24 [110/129] via , 00:01:57, Serial0/0/1
O /24 [110/128] via , 00:01:57, Serial0/0/1
R3#

13. OSPFv2 Neighbor Adjacencies
2001:DB8:CAFE:1::/64
OSPFv2 Neighbor Adjacencies
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
FULL/ :00: Serial0/0/0
R1#
R2’s OSPFv2 32-bit router-id
FD and RD using R2 as the successor

14. OSPFv2 LSDB Area 0 ISP R1 R2 R3 2001:DB8:CAFE:1::/64 192.168.1.0/24
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ip ospf data
OSPF Router with ID ( ) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
x x00DF5B 3
x x00260A 4
x x00B275 3
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
x x001D91 1
FD and RD using R2 as the successor

15. Traditional OSPFv3 Configuration
2001:DB8:CAFE:1::/64
Traditional OSPFv3 Configuration
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1(config)# ipv6 route ::/0 2001:db8:77::1
R1(config)# ipv6 unicast-routing
R1(config)# ipv6 router ospf 2
R1(config-rtr)# router-id
R1(config-rtr)# passive-interface gig 0/0
R1(config-rtr)# default-information originate
R1(config-rtr)# exit
R1(config)# interface gigabitethernet 0/0
R1(config-if)# ipv6 ospf 2 area 0
R1(config-if)# exit
R1(config)# interface serial 0/0/0
Required
OSPF process-id does not need to must match other routers
Uses same process as OSPFv2 for determining the 32-bit router-id; required command if there is no IPv4 address
OSPF for IPv6 is enabled on the interface, no network command
Criteria for deriving the router ID:
Configured router ID:
Configured with eigrp router-id router-id command
Note: Some versions of IOS will accept router-id.
Highest Loopback IPv4 address:
Highest active interface IPv4 address:
EIGRP (IPv4 and IPv6) requires a 32-bit router ID.
If there is no 32-bit IPv4 address configured on the router, then a router-id command is required.
This is used to uniquely identify the router in EIGRP messages.

16. Traditional OSPFv3 Configuration
2001:DB8:CAFE:1::/64
Traditional OSPFv3 Configuration
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2(config)# ipv6 unicast-routing
R2(config)# ipv6 router ospf 2
R2(config-rtr)# router-id
R2(config-rtr)# exit
R2(config)# interface serial 0/0/0
R2(config-if)# ipv6 ospf 2 area 0
R2(config-if)# exit
*Aug 1 02:42:29.015: %OSPFv3-5-ADJCHG: Process 2, Nbr on Serial0/0/0 from LOADING to FULL, Loading Done
R2(config)# interface serial 0/0/1
R2(config-if)#
Criteria for deriving the router ID:
Configured router ID:
Configured with eigrp router-id router-id command
Note: Some versions of IOS will accept router-id.
Highest Loopback IPv4 address:
Highest active interface IPv4 address:
EIGRP (IPv4 and IPv6) requires a 32-bit router ID.
If there is no 32-bit IPv4 address configured on the router, then a router-id command is required.
This is used to uniquely identify the router in EIGRP messages.

17. Traditional OSPFv3 Configuration
2001:DB8:CAFE:1::/64
Traditional OSPFv3 Configuration
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3(config)# ipv6 unicast-routing
R3(config)# ipv6 router ospf 2
R3(config-rtr)# router-id
R3(config-rtr)# passive-interface gigabitethernet 0/0
R3(config-rtr)# exit
R3(config)# interface serial 0/0/1
R3(config-if)# ipv6 ospf 2 area 0
*Jul 2 19:17:36.335: %OSPFv3-5-ADJCHG: Process 2, Nbr on Serial0/0/1 from LOADING to FULL, Loading Done
R3(config-if)# exit
R3(config)# interface gigabitethernet 0/0
Criteria for deriving the router ID:
Configured router ID:
Configured with eigrp router-id router-id command
Note: Some versions of IOS will accept router-id.
Highest Loopback IPv4 address:
Highest active interface IPv4 address:
EIGRP (IPv4 and IPv6) requires a 32-bit router ID.
If there is no 32-bit IPv4 address configured on the router, then a router-id command is required.
This is used to uniquely identify the router in EIGRP messages.

18. OSPFv3 Neighbor Adjacencies
2001:DB8:CAFE:1::/64
OSPFv3 Neighbor Adjacencies
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 ospf neighbor
OSPFv3 Router with ID ( ) (Process ID 2)
Neighbor ID Pri State Dead Time Interface ID Interface
FULL/ :00: Serial0/0/0
R1#
R2’s OSPFv3 32-bit router-id

19. OSPFv3 LSDB IPv6 LSAs Area 0 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 ospf database
OSPFv3 Router with ID ( ) (Process ID 2)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x E
x None
x None
<continued next slide>
IPv6 LSAs
Both router IDs – but only one has IPv6 link states associated with its process ID
R1# show ipv6 ospf database
OSPFv3 Router with ID ( ) (Process ID 1)
OSPFv3 Router with ID ( ) (Process ID 2)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x None
x None
x None
<continued next slide>

20. OSPFv3 LSDB (continued)
2001:DB8:CAFE:1::/64
OSPFv3 LSDB (continued)
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 ospf database <continued>
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
x Se0/0/0
x Se0/0/0
x Gi0/0
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
x x
x x
x x <continued>
New LSA type
New LSA type
Single area ospf

21. OSPFv3 LSDB (continued)
2001:DB8:CAFE:1::/64
OSPFv3 LSDB (continued)
Area 0
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 ospf database <continued>
Type-5 AS External Link States
ADV Router Age Seq# Prefix
x ::/0
R1#
Single area ospf

22. OSPFv3 Routes Area 0 ISP R1 R2 R3 2001:DB8:CAFE:1::/64 192.168.1.0/24
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ipv6 route ospf
IPv6 Routing Table - default - 8 entries
<output omitted>
OE2 ::/0 [110/1], tag 2
via FE80::2, Serial0/0/1
O :DB8:CAFE:1::/64 [110/129]
O :DB8:CAFE:2::/64 [110/128]
R3#
Default route originated by R1
Administrative distance of OSPF and OSPF metric
Single area ospf
Link-local address of R2

23. OSPFv3 Multi-area Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
OSPFv3 Multi-area
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
Area 51 – Totally Stubby Area for OSPFv2 and OSPFv3
Multi area ospf for both ospfv2 and ospfv3 so we can be consistent and make it easier to compare configs

24. Configure ABR Serial 0/0/0 configuration does not change
Area 0
2001:DB8:CAFE:1::/64
Configure ABR
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2(config)# interface serial 0/0/0
R2(config-if)# ip ospf 1 area 0
R2(config-if)# ipv6 ospf 2 area 0
R2(config-if)# exit
R2(config)# interface serial 0/0/1
R2(config-if)# ip ospf 1 area 51
R2(config-if)# ipv6 ospf 2 area 51
R2(config)# router ospf 1
R2(config-router)# area 51 stub no-summary
R2(config-router)# exit
R2(config)# ipv6 router ospf 2
R2(config-rtr)# area 51 stub no-summary
R2(config-rtr)#
Serial 0/0/0 configuration does not change
Router IDs already configured
Different router prompt for ospfv2 and ospfv3

25. Configure R3 Area 51 Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3(config)# interface serial 0/0/1
R3(config-if)# ip ospf 1 area 51
R3(config-if)# ipv6 ospf 2 area 51
R3(config-if)# exit
R3(config)# interface gigabitethernet 0/0
R3(config)# router ospf 1
R3(config-router)# area 51 stub
R3(config-router)# exit
R3(config)# ipv6 router ospf 2
R3(config-rtr)# area 51 stub
R3(config-rtr)#
Multi area ospf f

26. R1’s IPv4 Routing Table Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
R1’s IPv4 Routing Table
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ip route ospf
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
<output omitted>
O IA /24 [110/128] via , 00:04:26, Serial0/0/0
O IA /24 [110/129] via , 00:02:13, Serial0/0/0
R1#
Single area ospf

27. R1’s IPv6 Routing Table Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
R1’s IPv6 Routing Table
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 route ospf
IPv6 Routing Table - default - 7 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
<output omitted>
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application
OI 2001:DB8:CAFE:3::/64 [110/128]
via FE80::2, Serial0/0/0
OI 2001:DB8:CAFE:4::/64 [110/129]
R1#
Single area ospf

28. OSPFv2 Totally Stubby Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
OSPFv2 Totally Stubby
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
ABR Default
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ip route ospf
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
<output omitted>
Gateway of last resort is to network
O*IA /0 [110/65] via , 00:14:55, Serial0/0/1
R3#
Default route injected by ABR (Not default originated by ASBR R1)
Default route injected by ABR

29. OSPFv3 Totally Stubby Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
OSPFv3 Totally Stubby
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
ABR Default
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ipv6 route ospf
IPv6 Routing Table - default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application
OI ::/0 [110/65]
via FE80::2, Serial0/0/1
R3#
Default route injected by ABR (Not originated by ASBR R1)
Single area ospf

30. OSPFv3 Router Commands Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
OSPFv3 Router Commands
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2(config)# ipv6 router ospf 2
R2(config-rtr)# ?
area OSPF area parameters
auto-cost Calculate OSPF interface cost according to bandwidth
compatible Compatibility list
default Set a command to its defaults
default-information Distribution of default information
default-metric Set metric of redistributed routes
discard-route Enable or disable discard-route installation
distance Administrative distance
distribute-list Filter networks in routing updates
event-log Event Logging
<output omitted>
Multi area ospf

31. OSPFv3 Router Commands Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
OSPFv3 Router Commands
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2(config)# interface serial 0/0/0
R2(config-if)# ipv6 ospf ?
< > Process ID
cost Route cost of this interface
database-filter Filter OSPF LSA during synchronization and flooding
dead-interval Interval after which a neighbor is declared dead
demand-circuit OSPF demand circuit
flood-reduction OSPF Flood Reduction
hello-interval Time between HELLO packets
mtu-ignore Ignores the MTU in DBD packets
neighbor OSPF neighbor
network Network type
<output omitted>
Multi area ospf

32. OSPFv2 and OSPFv3 Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
ipv6 unicast-routing
interface Serial0/0/0
ip address
ip ospf 1 area 0
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:CAFE:2::2/64
ipv6 ospf 2 area 0 !
interface Serial0/0/1
ip address
ip ospf 1 area 51
ipv6 address 2001:DB8:CAFE:3::1/64
ipv6 ospf 2 area 51
router ospf 1
router-id
area 51 stub no-summary !
ipv6 router ospf 2
router-id
No automatic summarization for IPv6 because classful addressing does not exist.

33. 13.3: OSPFv3 Address Families

34. OSPFv3 with Address Families
IPv6
OSPFv3
OSPFv3
IPv6
Neighbor
Table
LSDB
Routing
Table
Neighbor
Table
LSDB
Routing
Table
IPv4
IPv4
Routing
Table
Routing
Table
IPv6 Network: All OSPFv3 AF messages (IPv4/IPv6) and IPv6 packets R1 R2
OSPFv3 messages, IPv4 and IPv6, are carried over IPv6
Single process supports IPv4 and IPv6
Single LSDB for both IPv4 and IPv6 information
Adjacencies are established for each address family
IPv4 Network: IPv4 packets

35. OSPFv3 with Address Families
Area 0
2001:DB8:CAFE:1::/64
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
IPv4 and IPv6 addresses have been configured on all interfaces
No routing protocols configured

36. OSPFv3 Address Families
Area 0
2001:DB8:CAFE:1::/64
OSPFv3 Address Families
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
Default
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1(config)# ip route
R1(config)# ipv6 route ::/0 2001:db8:77::1
R1(config)# ipv6 unicast-routing
R1(config)# router ospfv3 1
R1(config-router)# address-family ?
ipv4 Address family
ipv6 Address family
R1(config-router)# address-family ipv4 unicast
R1(config-router-af)#
Required
OSPF process-id does not need to must match other routers

37. OSPFv3 Address Families
R1(config-router)# address-family ipv4 unicast
R1(config-router-af)# ?
Router Address Family configuration commands:
area OSPF area parameters
auto-cost Calculate OSPF interface cost according to bandwidth
compatible Compatibility list
default Set a command to its defaults
default-information Control distribution of default information
default-metric Set metric of redistributed routes
discard-route Enable or disable discard-route installation
distance Define an administrative distance
distribute-list Filter networks in routing updates
event-log Event Logging
exit-address-family Exit from Address Family configuration mode
graceful-restart Graceful-restart options
help Description of the interactive help system
interface-id Source of the interface ID
limit Limit a specific OSPF feature
<continued next slide>
Commands previously configured in traditional router mode:
R1(config)# router ospf 1

38. OSPFv3 Address Families
R1(config-router)# address-family ipv4 unicast
R1(config-router-af)# ?
<continued?>
Limit a specific OSPF feature
log-adjacency-changes Log changes in adjacency state
max-lsa Maximum number of non self-generated LSAs to accept
max-metric Set maximum metric
maximum-paths Forward packets over multiple paths
no Negate a command or set its defaults
passive-interface Suppress routing updates on an interface
prefix-suppression Enable prefix suppression
queue-depth Hello/Router process queue depth
redistribute Redistribute information from another routing protocol
router-id router-id for this OSPF process
shutdown Shutdown the router process
snmp Modify snmp parameters
summary-prefix Configure IP address summaries
timers Adjust routing timers
R1(config-router-af)#

39. Configuring OSPFv3 AFs Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
Configuring OSPFv3 AFs
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1(config)# ipv6 unicast-routing
R1(config)# router ospfv3 1
R1(config-router)# address-family ipv4 unicast
R1(config-router-af)# router-id
R1(config-router-af)# default-information originate
R1(config-router-af)# passive-interface gigabitethernet 0/0
R1(config-router-af)# exit-address-family
R1(config-router)# address-family ipv6 unicast
R1(config-router-af)# router-id
R1(config-router)#
Walk through a complete configuration on R1 from the beginning

40. Configuring OSPFv3 AFs Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
Configuring OSPFv3 AFs
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1(config)# interface gigabitethernet 0/0
R1(config-if)# ospfv3 1 ipv4 area 0
R1(config-if)# ospfv3 1 ipv6 area 0
R1(config-if)# exit
R1(config)# interface serial 0/0/0
R1(config-if)#
Note: For IPv6, OSPFv3 will also accept the traditional IPv6 interface command: R1(config-if)# ipv6 ospf area 0

41. R2’s AF Configuration Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R2(config)# ipv6 unicast-routing
R2(config)# router ospfv3 1
R2(config-router)# address-family ipv4 unicast
R2(config-router-af)# router-id
R2(config-router-af)# area 51 stub no-summary
R2(config-router-af)# exit-address-family
R2(config-router)# address-family ipv6 unicast
R2(config-router-af)# router-id
R2(config-router)# exit
R2(config)# interface serial 0/0/0
R2(config-if)# ospfv3 1 ipv4 area 0
R2(config-if)# ospfv3 1 ipv6 area 0
R2(config-if)# exit
R2(config)# interface serial 0/0/1
R2(config-if)# ospfv3 1 ipv4 area 51
R2(config-if)# ospfv3 1 ipv6 area 51
R2(config-if)#

42. R3’s AF Configuration Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3(config)# ipv6 unicast-routing
R3(config)# router ospfv3 1
R3(config-router)# address-family ipv4 unicast
R3(config-router-af)# router-id
R3(config-router-af)# area 51 stub
R3(config-router-af)# passive-interface gig0/0
R3(config-router-af)# exit
R3(config-router)# address-family ipv6 unicast
R3(config-router-af)# router-id
R3(config-router-af)# exit-address-family
R3(config-router)# exit
R3(config)# interface serial 0/0/1
R3(config-if)# ospfv3 1 ipv4 area 51
R3(config-if)# ospfv3 1 ipv6 area 51
R3(config-if)# exit
R3(config)# interface gigabitethernet 0/0
R3(config-if)#

43. OSPFv3 IPv4 Routes Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ip route ospf
R1#
R1# 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
<output omitted>
Gateway of last resort is not set
O IA /24 [110/128] via , 00:06:40, Serial0/0/0
O IA /24 [110/129] via , 00:04:23, Serial0/0/0
Show ip route is fine…. Shows all IPv4 routes
Show ipv6 route is fine…. Shows all IPv6 routes

44. OSPFv3 IPv6 Routes Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 route ospf
IPv6 Routing Table - default - 7 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application
OI 2001:DB8:CAFE:3::/64 [110/128]
via FE80::2, Serial0/0/0
OI 2001:DB8:CAFE:4::/64 [110/129]
R1#

45. IPv4 AF Totally Stubby Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
IPv4 AF Totally Stubby
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
ABR Default
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# 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
<output omitted>
Gateway of last resort is to network
O*IA /0 [110/65] via , 00:26:42, Serial0/0/1
R3#
Default route injected by ABR

46. IPv6 AF Totally Stubby Area 0 Area 51 ISP R1 R2 R3
2001:DB8:CAFE:1::/64
IPv6 AF Totally Stubby
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
ABR Default
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R3# show ipv6 route ospf
IPv6 Routing Table - default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application
OI ::/0 [110/65]
via FE80::2, Serial0/0/1
R3#
Default route injected by ABR

47. OSPFv3 Neighbor Adjacencies
Area 0
2001:DB8:CAFE:1::/64
OSPFv3 Neighbor Adjacencies
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ip ospf neighbor
R1#
R1# show ospfv3 neighbor
OSPFv3 1 address-family ipv4 (router-id )
Neighbor ID Pri State Dead Time Interface ID Interface
FULL/ :00: Serial0/0/0
OSPFv3 1 address-family ipv6 (router-id )
FULL/ :00: Serial0/0/0

48. IPv6 Neighbor Adjacencies
Area 0
2001:DB8:CAFE:1::/64
IPv6 Neighbor Adjacencies
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ipv6 ospf neighbor
OSPFv3 Router with ID ( ) (Process ID 1)
Neighbor ID Pri State Dead Time Interface ID Interface
FULL/ :00: Serial0/0/0
R1#
Traditional OSPF command showing only IPv6 neighbors

49. Making Sense of the OSPF Keywords
R1# show ip ospf neighbor
Refers to OSPFv2 IPv4 process information
Only IPv4 neighbors will be displayed that were configured using OSPFv2
R1# show ipv6 ospf neighbor
Refers to OSPFv3 IPv6 process information
Only IPv6 neighbors will be displayed configured using OSPFv3
R1# show ospfv3 neighbor
Refers to OSPFv3 IPv4 and IPv6 process information
Both IPv4 and IPv6 neighbors will be displayed, but both must have been configured using OSPFv3

50. OSPFv3 LSDB Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ip ospf database
R1#
R1# show ospfv3 database
OSPFv3 1 address-family ipv4 (router-id )
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x None
x B
<output omitted>
<continued on next slide>
R1#show ospfv3 database
OSPFv3 1 address-family ipv4 (router-id )
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x None
x B
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix
x /24
x /24
x /24
x /24
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
x Se0/0/0
x Se0/0/0
x Gi0/0
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
x x
x x
OSPFv3 1 address-family ipv6 (router-id )
x None
x B
x :DB8:CAFE:3::/64
x :DB8:CAFE:4::/64
x Se0/0/0
x Se0/0/0
x Gi0/0
x x
x x
R1#

51. OSPFv3 LSDB Area 0 Area 51 ISP R1 R2 R3 2001:DB8:CAFE:1::/64
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
R1# show ospfv3 database <continued>
OSPFv3 1 address-family ipv6 (router-id )
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x None
x B
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix
x :DB8:CAFE:3::/64
x :DB8:CAFE:4::/64
<output omitted>
R1#show ipv6 ospf database
OSPFv3 Router with ID ( ) (Process ID 1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
x None
x B
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix
x :DB8:CAFE:3::/64
x :DB8:CAFE:4::/64
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
x Se0/0/0
x Se0/0/0
x Gi0/0
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
x x
x x
R1#

52. R1’s OSPFv3 AF Configuration
Area 0
2001:DB8:CAFE:1::/64
R1’s OSPFv3 AF Configuration
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
ipv6 unicast-routing
interface GigabitEthernet0/0
ip address
ipv6 address FE80::1 link-local
ipv6 address 2001:DB8:CAFE:1::1/64
ospfv3 1 ipv6 area 0
ospfv3 1 ipv4 area 0 !
interface Serial0/0/0
ip address
ipv6 address 2001:DB8:CAFE:2::1/64
router ospfv3 1 !
address-family ipv4 unicast
passive-interface GigabitEthernet0/0
default-information originate
router-id
exit-address-family
address-family ipv6 unicast
router-id

53. 13.4: OSPFv3 Address Families – IPv4 Island

54. R3’s Current Configuration
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
ipv6 unicast-routing
interface GigabitEthernet0/0
ip address
ipv6 address FE80::3 link-local
ipv6 address 2001:DB8:CAFE:4::1/64
ospfv3 1 ipv6 area 51
ospfv3 1 ipv4 area 51 !
interface Serial0/0/1
ip address
ipv6 address 2001:DB8:CAFE:3::2/64
router ospfv3 1 !
address-family ipv4 unicast
router-id
area 51 stub
exit-address-family
address-family ipv6 unicast
router-id
Add R4 (IPv4 only)
R4 only has an IPv4 connection with R3
We will configure R3 and R4 to use OSPFv3 with AF.

55. R3 - Configuring OSPFv3 for IPv4
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1
IPv6 Network: All OSPFv3 AF messages (IPv4/IPv6) and IPv6 packets R2 R3 R4
FE80::3
/24
/24
R3(config)# interface serial 0/1/0
R3(config-if)# ip address
R3(config-if)# ospfv3 1 ipv4 area 51
% OSPFv3: IPV6 is not enabled on this interface
R3(config-if)# ipv6 enable
R3(config-if)# no shutdown
R3(config-if)#
Alternatively – static link-local address:
ipv6 address FE80::2 link-local
ipv6 enable command automatically creates an IPv6 link-local address on the interface using EUI-64, without needing an IPv6 global unicast address.

56. R4 - Configuring OSPFv3 for IPv4
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4(config)# router ospfv3 1
%OSPFv3: IPv6 routing not enabled
R4(config)# ipv6 unicast-routing
R4(config-router)# address-family ipv4 unicast
*Sep 19 03:46:44.866: %OSPFv3-4-NORTRID: Process OSPFv3-1-IPv4 could not pick a router-id, please configure manually
R4(config-router-af)# router-id
R4(config-router-af)# area 51 stub
R4(config-router-af)# exit-address-family
R4(config-router)# exit
R4(config)#
Still need to configure IPv4 addresses on the interfaces

57. R4 - Configuring OSPFv3 for IPv4
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4(config)# interface serial 0/0/0
R4(config-if)# ip address
R4(config-if)# ipv6 enable
R4(config-if)# ospfv3 1 ipv4 area 51
R4(config-if)# no shutdown
R4(config-if)# exit
R4(config)# interface gigabitethernet 0/0
R4(config-if)# ip address

58. R4’s IPv4 Routing Table Area 51 R2 R3 R4 R4’s IPv4 routing table.
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4# show ip route
<output omitted>
Gateway of last resort is to network
O*IA /0 [110/129] via , 00:03:44, Serial0/0/0
/16 is variably subnetted, 4 subnets, 2 masks
C /24 is directly connected, Serial0/0/0
L /32 is directly connected, Serial0/0/0
C /24 is directly connected, GigabitEthernet0/0
L /32 is directly connected, GigabitEthernet0/0
O /24 [110/128] via , 00:03:44, Serial0/0/0
O /24 [110/65] via , 00:03:44, Serial0/0/0
R4#
R4’s IPv4 routing table.
We will examine just the OSPF routes next…

59. R4’s OSPFv3 IPv4 Routes Area 51 R2 R3 R4 Default route injected by ABR
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
ABR Default
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4# show ip route ospf
R4#
R4# 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
<output omitted>
Gateway of last resort is to network
O*IA /0 [110/129] via , 00:16:20, Serial0/0/0
O /24 [110/128] via , 00:16:20, Serial0/0/0
O /24 [110/65] via , 00:16:20, Serial0/0/0
Default route injected by ABR
Internal OSPFv3
R4#show ip route
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 to network
O*IA /0 [110/129] via , 00:18:02, Serial0/0/0
/16 is variably subnetted, 4 subnets, 2 masks
C /24 is directly connected, Serial0/0/0
L /32 is directly connected, Serial0/0/0
C /24 is directly connected, GigabitEthernet0/0
L /32 is directly connected, GigabitEthernet0/0
O /24 [110/128] via , 00:18:02, Serial0/0/0
O /24 [110/65] via , 00:18:02, Serial0/0/0
R4#show ipv6 route
IPv6 Routing Table - default - 1 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application
L FF00::/8 [0/0]
via Null0, receive
R4#

60. R1’s OSPFv3 IPv4 Routes Area 51 Area 0 R2 R4 R1 IPv4 only
2001:DB8:CAFE:1::/64
R1’s OSPFv3 IPv4 Routes
Area 51
Area 0
/24
G0/0
:1/.1
2001:DB8:CAFE:2::/64
IPv4 only
FE80::1
S0/0/0 .2
S0/0/0
:2/.2
G0/0 .1
S0/0/0
:1/.1 R2 R4 R1
/24
/24
/24
R1# 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
<output omitted>
/24 is subnetted, 2 subnets
O IA [110/192] via , 00:27:50, Serial0/0/0
O IA [110/193] via , 00:01:34, Serial0/0/0
O IA /24 [110/128] via , 01:51:39, Serial0/0/0
O IA /24 [110/129] via , 01:42:46, Serial0/0/0
R1#

61. OSPFv3 Sent over IPv6 Area 51 R2 R3 R4
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4# debug ospfv3 hello detail
OSPFv3 hello detailed debugging is on for process 1, IPv4, Default vrf
*Sep 19 04:16:31.010: OSPFv3-1-IPv4 HELLO Se0/0/0: Send hello to FF02::5 area 51 from FE80::8A5A:92FF:FE38:3C40 interface ID 6
*Sep 19 04:16:39.210: OSPFv3-1-IPv4 HELLO Se0/0/0: Rcv hello from area 51 from FE80::8A5A:92FF:FE3B:8D40 interface ID 8
*Sep 19 04:16:39.598: OSPFv3-1-IPv4 HELLO Gi0/0: Send hello to FF02::5 area 51 from FE80::8A5A:92FF:FE38:3C40 interface ID 3
R4# un all
OSPFv3 messages sent over IPv6 – notice EUI-64 derived link-local 
Hello’s sent from IPv6 link-local address to FF02::5 All OSPF routers

62. Verifying R4’s OSPFv3 Neighbor Adjacencies
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
R4# show ip ospf neighbor
R4#
R4# show ipv6 ospf neighbor
R4# show ospfv3 neighbor
OSPFv3 1 address-family ipv4 (router-id )
Neighbor ID Pri State Dead Time Interface ID Interface
FULL/ :00: Serial0/0/0
Displays OSPFv2 information, R4 is using OSPFv3
Displays OSPFv3 information, but IPv6 only. Although sent over IPv6, adjacencies are established separately for each address family.
Displays OSPFv3 information for both IPv4 and IPv6.
Adjacencies are established for each address family

63. Added Configuration for R3
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
ipv6 unicast-routing
interface GigabitEthernet0/0
ip address
ipv6 address FE80::3 link-local
ipv6 address 2001:DB8:CAFE:4::1/64
ospfv3 1 ipv6 area 51
ospfv3 1 ipv4 area 51 !
interface Serial0/0/1
ip address
ipv6 address 2001:DB8:CAFE:3::2/64
interface Serial0/1/0
ip address
ipv6 enable
ospfv3 1 ipv4 area 51 !
router ospfv3 1
address-family ipv4 unicast
router-id
area 51 stub
exit-address-family
address-family ipv6 unicast
router-id
Added for an OSPFv3 IPv4 adjacency to R4

64. R4’s OSPFv3 IPv4 Island Configuration
Area 51
2001:DB8:CAFE:3::/64
G0/0
:1/.1
2001:DB8:CAFE:4::/64
IPv4 only
FE80::2
/24
/24
S0/0/0 .2
S0/0/1
:2/.2
S0/1/0 .1
G0/0 .1
S0/0/1
:1/.1 R2 R3 R4
FE80::3
/24
/24
ipv6 unicast-routing
interface GigabitEthernet0/0
ip address
ipv6 enable
ospfv3 1 ipv4 area 51 !
interface Serial0/0/0
ip address
router ospfv3 1 !
address-family ipv4 unicast
router-id
area 51 stub
exit-address-family

65. 12.4: OSPF Configurations at a Glance

66. OSPFv2 & Traditional OSPFv3
Area 0
2001:DB8:CAFE:1::/64
OSPFv2 & Traditional OSPFv3
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
ipv6 unicast-routing
interface Serial0/0/0
ip address
ip ospf 1 area 0
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:CAFE:2::2/64
ipv6 ospf 2 area 0 !
interface Serial0/0/1
ip address
ip ospf 1 area 51
ipv6 address 2001:DB8:CAFE:3::1/64
ipv6 ospf 2 area 51
router ospf 1
router-id
area 51 stub no-summary !
ipv6 router ospf 2
router-id
Optional configuration for OSPFv2:
router ospf 1
network area 0
network area
No automatic summarization for IPv6 because classful addressing does not exist.

67. R2’s OSPFv3 AF Configuration
Area 0
2001:DB8:CAFE:1::/64
R2’s OSPFv3 AF Configuration
Area 51
/24
2001:DB8:77::/64
G0/0
:1/.1
2001:DB8:CAFE:2::/64
2001:DB8:CAFE:3::/64
2001:DB8:CAFE:4::/64
FE80::1
FE80::2
FE80::3
S0/0/1
:2/.2
S0/0/0
:2/.2
S0/0/1
:2/.2
G0/0
:1/.1
S0/0/0
:1/.1
S0/0/1
:1/.1
ISP R1 R2 R3
/24
/24
/24
/24
ipv6 unicast-routing
interface Serial0/0/0
ip address
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:CAFE:2::2/64
ospfv3 1 ipv4 area 0
ospfv3 1 ipv6 area 0 !
interface Serial0/0/1
ip address
ipv6 address 2001:DB8:CAFE:3::1/64
ospfv3 1 ipv4 area 51
ospfv3 1 ipv6 area 51
router ospfv3 1 !
address-family ipv4 unicast
router-id
area 51 stub no-summary
exit-address-family
address-family ipv6 unicast
router-id

68. For more information please check out my Cisco Press book and video series:
IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6
By Rick Graziani
ISBN-10:
IPv6 Fundamentals LiveLessons: A Straightforward Approach to Understanding IPv6
By Rick Graziani
ISBN-10:

69. 13: OSPFv3
Rick Graziani
Cabrillo College