Specifications

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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-5260-01
Chapter 5 Administering the Access Point
Managing the System Time and Date
To disable NTP authentication, use the no ntp authenticate global configuration command. To remove
an authentication key, use the no ntp authentication-key number global configuration command. To
disable authentication of the identity of a device, use the no ntp trusted-key key-number global
configuration command.
This example shows how to configure the access point to synchronize only to devices providing
authentication key 42 in the device’s NTP packets:
AP(config)# ntp authenticate
AP(config)# ntp authentication-key 42 md5 aNiceKey
AP(config)# ntp trusted-key 42
Step 3
ntp authentication-key number md5 value Define the authentication keys. By default, none are defined.
• For number, specify a key number. The range is 1 to
4294967295.
• md5 specifies that message authentication support is provided
by using the message digest algorithm 5 (MD5).
• For value, enter an arbitrary string of up to eight characters for
the key.
The access point does not synchronize to a device unless both have
one of these authentication keys, and the key number is specified by
the ntp trusted-key key-number command.
Step 4
ntp trusted-key key-number Specify one or more key numbers (defined in Step 3) that a peer
NTP device must provide in its NTP packets for this access point to
synchronize to it.
By default, no trusted keys are defined.
For key-number, specify the key defined in Step 3.
This command provides protection against accidentally
synchronizing the access point to a device that is not trusted.
Step 5
end Return to privileged EXEC mode.
Step 6
show running-config Verify your entries.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose