You issue the show ipv6 interface fa0/0 command and receive the following partial output:
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, linklocal address is FE80::11AA:22BB:33CC:44DD
No Virtual linklocal address(es):
No global unicast address is configured
Joined group address(es):
FF02::1
FF02::2
FF02::A
Which of the following routing protocols is most likely running on the network? (Select the best answer.)
A. EIGRPv6
B. IS-IS for IPv6
C. OSPFv3
D. RIPv6
Explanation:
Enhanced Interior Gateway Routing Protocol version 6 (EIGRPv6) is most likely running on the network. All EIGRPv6 routers receive packets from the IPv6 multicast address FF02::A, which is similar to the EIGRP IPv4 allrouters address 224.0.0.10. This addressis used to exchange hello packets and routing updates among EIGRP routers.
All IPv6 nodes on a segment receive packets destined for FF02::1, which is similar to the IPv4 allhosts multicast address 224.0.0.1. Traffic sent to FF02::1 is received by all hosts on the local segment. IPv6 nodes automatically join the FF02::1 multicast group at startup.
All IPv6 routers on a segment receive packets destined for FF02::2, which is similar to the IPv4 allrouters multicast address 224.0.0.2. Traffic sent to FF02::1 is received by all routers on the local segment. IPv6 routers automatically join the FF02::2 multicast group at startup.
Open Shortest Path First version 3 (OSPFv3) is not running on the network. All OSPFv3 routers receive packets destined for FF02::5, which is similar to the OSPFv2 allrouters multicast address 224.0.0.5. OSPFv3 designated routers (DRs) and backup designated routers (BDRs) receive packets destined for FF02::6, which is similar to the OSPFv2 allDR/BDR multicast address 224.0.0.6. These multicast addresses are used to exchange hello messages and linkstate advertisements (LSAs) among OSPF routers. If OSPFv3 were running on the network, the output would indicate that the router has joined the FF02::5 and FF02::6 multicast groups.
Intermediate SystemtoIntermediate System (ISIS) for IPv6 is not running on the network. All ISIS routers receive packets destined for FF02::8, which is similar to the ISIS for IPv4 multicast addresses 224.0.0.19 through 224.0.0.21. Level 1 (L1) routers receive packets destined for 224.0.0.19, Level 2 (L2) routers receive packets destined for 224.0.0.20, and all ISIS routers receive packets destined for 224.0.0.21.
Routing Information Protocol version 6 (RIPv6) is not running on the network. All RIPv6 routers receive packets destined for FF02::9, which is similar to the RIPv2 allrouters multicast address 224.0.0.9. This address is used to exchange hello packets and routing updates among RIP routers.
Reference:
Cisco: Advances in EIGRP (PDF)