Bogdan Doinea & Eric Kwok Configuring OSPFv3 Technical Manager Cisco Networking Academy

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2 Neighbor Table Topology Table Topology Table Routing Table Neighbor Table Topology Table Topology Table Routing Table Neighbor Table Topology Table Topology Table Routing Table Neighbor Table Topology Table Topology Table Routing Table IPv4 IPv6 With the OPSFv3 Address Families features, the protocol supports both IPv4 and IPv6

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3 Similarities between OSPFv2 and OSPFv3 Link-StateYes Routing AlgorithmSPF MetricCost AreasSame multi-area hierarchy and relationship Packet TypesHello, DBD, LSR, LSU, LSAck Neighbor DiscoverySame states of transition in building an adjacency DR and BDRFunction and election process is the same Router ID32-bit router ID: determined by the same process in both protocols

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4 Differences between OSPFv2 and OSPFv3 AdvertisesIPv4 NetworksIPv6 prefixes Source AddressIPv4 global source address IPv6 link-local address Destination AddressNeighbor IPv4 addresses /6 Neighbor IPv6 link- local addresses FF02::5/6 Advertise NetworksConfigured using the network command in router mode Configured using the ipv6 ospf process-id area-id command. IP Unicast RoutingIPv4 unicast routing is enabled IPv6 unicast-routing not enabled by default AuthenticationPlaint text and MD5Based on IPSec in IPv6

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5 OSPFv2 OSPFv3 Router and Network LSAs contain addressing information 1. Router LSA – describe directly-attached networks in the area 2. Network LSA – generated by DR to describe the neighbors connected to the segment Neither LSA 1 or 2 contain any prefix or address information! 1.Router LSA – describe the state&cost of the router’s interfaces in the area 2.Network LSA – generated by the DR to describe all the routers connected to the segment 3.OSPFv3 Introduces 2 new LSAs Link LSA Intra-area Prefix LSA

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6 The source address is always the link-local address of the router The destination is either link-local or IPv6 multicast Neighbor Table Topology Table Topology Table Routing Table Neighbor Table Topology Table Topology Table Routing Table Link-Local Address

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7 In which of the below 3 options is: unicast routing enabled by default? IPSec used for authentication? the protocol a Link-State Routing Protocol? OSPF v2OSPF v3Both protocols

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8 In which of the below 3 does the protocol: use cost as a metric? elects a DR and BDR? uses FF02::6 for DR and BDR multicasts? uses for DR and BDR multicasts? OSPF v2OSPF v3Both protocols

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9 Basic Configuration (config)# ipv6 router ospf process-id (config-rtr)# router-id (config-rtr)# auto-cost reference-bandwidth 1000 (config)# interface fa0/0 (config-if)# ipv6 ospf 1 area 0 Reset OSPF process #clear ipv6 ospf process

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10 #show ipv6 route ospf #show ipv6 protocol

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 11 #show ipv6 ospf #show ipv6 ospf neighbor

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12 #show ipv6 ospf database #show ipv6 ospf interface

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13 #debug ipv6 ospf adj #debug ipv6 ospf event

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 14 A B C A:: B:: C:: Area 0 Prefix Length /64 AC:: AB:: BC:: Command: show ipv6 ospf neighbor show ipv6 ospf interface show ipv6 ospf database show ipv6 route ospf show ipv6 protocol debug ipv6 ospf adj debug ipv6 ospf event RID: RID: RID:

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15 Ipv6 unicast must be enabled for OSPFv3 C(config)#ipv6 router ospf 1 % IPv6 routing not enabled OSPFv3 router-id follows the same rule as OSPFv2 (IPv4). You might need to configure it manually if not IPv4 address presented C(config-if)#ipv6 ospf 1 area 0 %OSPFv3-4-NORTRID: OSPFv3 process 1 could not pick a router- id,please configure manually OSPFv3 is enabled by the interface sub command not the network statement The next-hop address is link-local address, not global unicast address

© 2012 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16 Implementing OSPF for IPv6 ospf.html Implementing IPsec in IPv6 Security ipsec.html