Refer to the exhibit. Router R1 has recently been configured to operate in an IPv6 only network and is connected via interface Gigabit Ethernet 0/0 to router R2. R2 is configured correctly, but will not form a neighbor relationship with R1 What is the problem?

Refer to the exhibit. Router R1 has recently been configured to operate in an IPv6 only network and is connected via interface Gigabit Ethernet 0/0 to router R2. R2 is configured correctly, but will not form a neighbor relationship with R1 What is the problem?

CCNP Enterprise: Advanced Routing ( Version 8.0) - Routing Concepts and EIGRP Exam

• The IP address is missing on interface Gigabit Ethernet 0/0.
• The router ID has not been created on router R1.
• The EIGRPv6 process has not been activated on interface Gigabit Ethernet 0/0.
• The command ipv6 unicast-routing has not been implemented.

Explanation: To successfully implement EIGRPv6 on a Cisco router, the administrator must provide a router ID within the EIGRPv6 router configuration mode. EIGRPv6 will fail to form a neighbor relationship until the router ID is provided. Being an IPv6 only network indicates that there are no configured IPv4 addresses on the router to provide a router ID. The fact that the command ipv6 eigrp 20 was successfully entered into the R1 configuration indicates that the command ipv6 unicast-routing has been entered (otherwise, the ipv6 eigrp 20 command would be rejected).

Exam with this question: CCNP Enterprise: Advanced Routing (Version 8.0) – Routing Concepts and EIGRP Exam