EIGRPv6 Fundamentals

7 important questions on EIGRPv6 Fundamentals

Which IPv6 addresses are used by EIGRPv6?

The IPv6 link-local address as a source and, depending on the packet type, as a destination the link-local address or the EIGRPv6 multicast address of FF02::A.

Which EIGRPv6 packets are there, on which ip are they communicated and what is their purpose?

All the packets are sourced from the link-local address.
Hello packet | FF02::A
Neighbor discovery and keepalive

Acknowledgement packet | Link-Local
Ack receipt of an update

Query packet | FF02::A
Request for route info during topology change event.

Reply packet | Link-Local
Reponse to Query packet

Update | FF02::A
Topology change

Update | Link-Local
Adjacency forming

In which modes can EIGRPv6 be configured?

In both Classic AS Mode and Named mode.
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What is important to note in EIGRPv6 about the network statement normally used in IPv4 EIGRP?

It isn't available with EIGRPv6, the routing protocol must be enabled directly on the interface.

What is important to note about IPv6 enabled interfaces when enabling the IPv6 address-family in EIGRP Named Mode?

They all start participating in routing by defaut.

How does route summarization in EIGRPv6 work opposed to IPv4 EIGRP?

Manual Route summarization works exactly the same way.

Auto Summarization is not present in IPv6 because there is no concept of classful and classless routing.

How can you advertise a default route in EIGRPv6?

By placing the default prefix (::/0) as a summary address at the interface level.

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