Administering the WMIC
Managing the System Time and Date
47
Cisco 3200 Series Wireless MIC Software Configuration Guide
Configuring NTP
WMICs do not have a hardware-supported clock, and they cannot function as an NTP master clock to
which peers synchronize when an external NTP source is not available. These devices also have no
hardware support for a calendar. As a result, the
ntp update-calendar
and the
ntp master
commands
are not available.
Default NTP Configuration
Table 4
shows the default NTP configuration.
NTP is disabled by default.
Configuring NTP Authentication
This procedure must be coordinated with the administrator of the NTP server; the information you
configure in this procedure must be matched by the servers that the WMIC uses to synchronize its time
to the NTP server.
To authenticate the associations (communications between devices running NTP that provide for
accurate timekeeping) with other devices
, follow these steps, beginning in privileged EXEC mode:
Table 4
Default NTP Configuration
Feature
Default Setting
NTP authentication
Disabled. No authentication key is specified.
NTP peer or server associations
None configured.
NTP broadcast service
Disabled; no interface sends or receives NTP broadcast packets.
NTP access restrictions
No access control is specified.
NTP packet source IP address
The source address is determined by the outgoing interface.
Command
Purpose
Step 1
configure terminal
Enters global configuration mode.
Step 2
ntp authenticate
Enables the NTP authentication feature, which is disabled by
default.
Step 3
ntp authentication-key
number
md5
value
Defines the authentication keys. By default, none are defined.
•
For
number
, specify a key number. The range is from 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 WMIC does not synchronize to a device unless both it and the
device have an authentication key, and the key number is specified
by the
ntp trusted-key
key-number
command.