Use the no form of this command to restore the default value. The name you assign to the crypto map set. Defaults Xauth is not enabled. This command was introduced in Cisco IOS Release 12.1 T. Usage Guidelines Before configuring Xauth, you should set up an authentication list using AAA commands. After enabling Xauth, you should apply the crypto map on which Xauth is configured to the router interface.
Authentication establishes data integrity and ensures no one tampers with the data in transit.
It also provides data origin authentication. A key management protocol standard which is used in conjunction with the IPSec standard. IPSec is an IP security feature that provides robust authentication and encryption of IP packets. IPSec can be configured without IKE, but IKE enhances IPSec by providing additional features, flexibility, and ease of configuration for the IPSec standard. A framework of open standards that provides data confidentiality, data integrity, and data authentication between participating peers.