Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

To enable or change various OSPF authentication parameters, use the following commands.

• Set a clear text authentication scheme on the interface. CONFIG-INTERFACE mode ip ospf authentication-key key Configure a key that is a text string no longer than eight characters. All neighboring routers must share password to exchange OSPF information.
• Set the authentication change wait time in seconds between 0 and 300 for the interface. CONFIG-INTERFACE mode ip ospf auth-change-wait-time seconds This setting is the amount of time OSPF has available to change its interface authentication type. During the auth-change-wait-time, OSPF sends out packets with both the new and old authentication schemes. This transmission stops when the period ends. The default is 0 seconds.