Managing NTP Authentication

To prevent false time information from unauthorized servers, enable NTP authentication to allow an authenticated server and client to exchange time information. The currently supported authentication method is the RSA Data Security, Inc. MD5 Message-Digest Algorithm. First, enable NTP authentication globally on the switch. Then create an NTP authentication key configured as trusted, to check the encryption key against the key on the receiving device before an NTP packet is sent. After configuration is complete, an NTP server, peer, and broadcast server can use NTP authenticated service.