Reference Guide

Version 8.2.1.0 Added options [0 | 7] for entering the authentication key.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
pre-Version
6.1.1.0
Introduced on the E-Series.
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 ntp
authentication-key
command. 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 authenticate — enables NTP authentication.
ntp trusted-key — configures a trusted key.
ntp broadcast client
Set up the interface to receive NTP broadcasts from an NTP server.
Z-Series
Syntax
ntp broadcast client
To disable broadcast, use the no ntp broadcast client command.
Defaults Disabled.
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
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