Configuring Ntp; Default Ntp Configuration; Configuring Ntp Authentication - Cisco C3201FESMIC-TP= - 3201 Fast EN Switch Mobile Interface Card Expansion Module Software Configuration Manual

Administering the WMIC

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
Table 4
Feature
NTP authentication
NTP peer or server associations
NTP broadcast service
NTP access restrictions
NTP packet source IP address
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:
Command
Step 1 configure terminal
Step 2 ntp authenticate
Step 3
ntp authentication-key number md5 value
shows the default NTP configuration.
Default NTP Configuration
Default Setting
Disabled. No authentication key is specified.
None configured.
Disabled; no interface sends or receives NTP broadcast packets.
No access control is specified.
The source address is determined by the outgoing interface.
Purpose
Enters global configuration mode.
Enables the NTP authentication feature, which is disabled by
default.
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.
Cisco 3200 Series Wireless MIC Software Configuration Guide
Managing the System Time and Date
47