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Chapter 5
Administering the Bridge
Command
Step 5
end
Step 6
show running-config
Step 7
copy running-config startup-config
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 bridge to synchronize only to devices providing authentication
key 42 in the device's NTP packets:
bridge(config)# ntp authenticate
bridge(config)# ntp authentication-key 42 md5 aNiceKey
bridge(config)# ntp trusted-key 42
Configuring NTP Associations
An NTP association can be a peer association (this bridge can either synchronize to the other device or
allow the other device to synchronize to it), or it can be a server association (meaning that only this
bridge synchronizes to the other device, and not the other way around).
Beginning in privileged EXEC mode, follow these steps to form an NTP association with another device:
Command
Step 1
configure terminal
Step 2
ntp peer ip-address [version number]
[key keyid] [source interface] [prefer]
or
ntp server ip-address [version number]
[key keyid] [source interface] [prefer]
OL-4059-01
Purpose
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Configure the bridge system clock to synchronize a peer or to be
synchronized by a peer (peer association).
or
Configure the bridge system clock to be synchronized by a time server
(server association).
No peer or server associations are defined by default.
For ip-address in a peer association, specify either the IP address of
•
the peer providing, or being provided, the clock synchronization. For
a server association, specify the IP address of the time server
providing the clock synchronization.
(Optional) For number, specify the NTP version number. The range is
•
1 to 3. By default, version 3 is selected.
(Optional) For keyid, enter the authentication key defined with the
•
ntp authentication-key global configuration command.
(Optional) For interface, specify the interface from which to pick the
•
IP source address. By default, the source IP address is taken from the
outgoing interface.
(Optional) Enter the prefer keyword to make this peer or server the
•
preferred one that provides synchronization. This keyword reduces
switching back and forth between peers and servers.
Cisco Aironet 1400 Series Wireless Bridges Software Configuration Guide
Managing the System Time and Date
5-21
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