Reference Guide

1436 | Time and Network Time Protocol (NTP)
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ntp authenticate
c e s
Enable authentication of NTP traffic between the switch and the NTP time serving hosts.
Syntax
ntp authenticate
To disable NTP authentication, enter no ntp authentication.
Defaults
Not enabled.
Command Modes
CONFIGURATION
Command
History
Usage
Information
You also must configure an authentication key for NTP traffic using the ntp authentication-key
command.
Related
Commands
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
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 authentication-key Configure authentication key for NTP traffic.
ntp trusted-key Configure a key to authenticate
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