Which statement about OSPFv3 and EIGRP for IPv6 is correct?

Which statement about OSPFv3 and EIGRP for IPv6 is correct?

• A. They are identical to their IPv4 counterparts with no changes.
• B. They do not use address families.
• C. They route IPv6 networks using IPv4 neighbor relationships.
• D. They use address families and IPv6-specific LSA/updates to support IPv6 addressing.

Answer: (D)

Routing protocols that support IPv6 must carry IPv6 prefixes and operate with IPv6 addressing, not rely on the IPv4 mechanisms alone. OSPFv3 and EIGRP for IPv6 achieve this by introducing the concept of address families and by exchanging IPv6-specific information (LSAs and updates) so each protocol can build separate IPv6 routing information without mixing it with IPv4. This is why the correct statement is that they use address families and IPv6-specific LSA/updates to support IPv6 addressing. The protocol processes maintain IPv6 routes in their own IPv6 routing tables, using adjacencies formed over IPv6 and distributing IPv6 prefixes via IPv6-aware messages. In short, IPv6 support isn’t a copy of IPv4; it requires IPv6-specific mechanics, which these protocols implement through address families and IPv6-centric updates.

Routing protocols that support IPv6 must carry IPv6 prefixes and operate with IPv6 addressing, not rely on the IPv4 mechanisms alone. OSPFv3 and EIGRP for IPv6 achieve this by introducing the concept of address families and by exchanging IPv6-specific information (LSAs and updates) so each protocol can build separate IPv6 routing information without mixing it with IPv4.

This is why the correct statement is that they use address families and IPv6-specific LSA/updates to support IPv6 addressing. The protocol processes maintain IPv6 routes in their own IPv6 routing tables, using adjacencies formed over IPv6 and distributing IPv6 prefixes via IPv6-aware messages. In short, IPv6 support isn’t a copy of IPv4; it requires IPv6-specific mechanics, which these protocols implement through address families and IPv6-centric updates.