Reference Guide

Open Shortest Path First (OSPFv2 and OSPFv3) | 675
Configuring IPsec Encryption on an Interface
To configure, remove, or display IPsec encryption on an interface, use the following commands.
Prerequisite: Before you enable IPsec encryption on an OSPFv3 interface, first enable IPv6 unicast routing
globally, configure an IPv6 address and enable OSPFv3 on the interface, and assign it to an area (refer to
Configuration Task List for OSPFv2 (OSPF for IPv4)).
Note: When you configure encryption using the ipv6 ospf encryption ipsec command, you
enable both IPsec encryption and authentication. However, when you enable authentication on an
interface using the ipv6 ospf authentication ipsec command, you do not enable encryption at
the same time.