IPsec authentication for OSPFv3

This feature introduces IPsec support for OSPFv3. IP Security (IPsec) provides a secure way to authenticate senders and encrypt IP version 4 (IPv4) traffic between network devices. IPsec offers network administrators for EX Series switches and their users the benefits of data confidentiality, data integrity, sender authentication, and anti-replay services. OSPF version 3 (OSPFv3) uses authentication header (AH) and the IP Encapsulating Security Payload (ESP) protocols to authenticate routing information. OSPF version 3 (OSPFv3), unlike OSPF version 2 (OSPFv2), does not have a built-in authentication method and relies on IPsec to provide this functionality.