Command Line Reference Guide

1362 | Time and Network Time Protocol (NTP)
www.dell.com | support.dell.com
ntp authentication-key
c e s
Specify a key for authenticating the NTP server.
Syntax
ntp authentication-key number md5 [0 | 7] key
Parameters
Defaults
NTP authentication is not configured by default. If you do not specify the option [0 | 7], 0 is selected
by default.
Command Modes
CONFIGURATION
Command
History
Usage
Information
After configuring the ntp authentication-key command, configure the ntp trusted-key command to
complete NTP authentication.
FTOS versions 8.2.1.0 and later use an encryption algorithm to store the authentication key that is
different from previous FTOS versions; beginning in version 8.2.1.0, FTOS uses DES encryption to
store the key in the startup-config when you enter the command ntp authentication-key. Therefore, if
your system boots with a startup-configuration from an FTOS versions prior to 8.2.1.0 in which you
have configured ntp authentication-key, the system cannot correctly decrypt the key, and cannot
authenticate NTP packets. In this case you must re-enter this command and save the running-config to
the startup-config.
Related
Commands
ntp broadcast client
c e s
Set up the interface to receive NTP broadcasts from an NTP server.
Syntax
ntp broadcast client
To disable broadcast, enter no ntp broadcast client.
Defaults
Disabled
Command Modes
INTERFACE
number
Specify a number for the authentication key.
Range: 1 to 4294967295.
This number must be the same as the number parameter configured in the ntp trusted-key command.
md5
Specify that the authentication key will be encrypted using MD5 encryption algorithm.
0
Specify that authentication key will be entered in an unencrypted format (default).
7
Specify that the authentication key will be entered in DES encrypted format.
key
Enter the authentication key in the previously specified format.
Version 8.2.1.0 Added options [0 | 7] for entering authentication key.
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
pre-Version 6.1.1.0 Introduced for E-Series
ntp authenticate Enables NTP authentication.
ntp trusted-key Configure a trusted key.