Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

Enabling OSPFv2 Authentication

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.
  When you configure the auth-change-wait-time, OSPF sends out only the old authentication scheme until the wait timer expires. After the wait timer expires, OSPF sends only the new authentication scheme. However, the new authentication scheme does not take effect immediately after the authentication change wait timer expires; OSPF accepts both the old as well as new authentication schemes for a time period that is equal to two times the configured authentication change wait timer. After this time period, OSPF accepts only the new authentication scheme.
  This transmission stops when the period ends.
  The default is 0 seconds.