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Cisco 4700 Series Application Control Engine Appliance Administration Guide
OL-11157-01
Chapter 1 Setting Up the ACE
Synchronizing the ACE with an NTP Server
• prefer—(Optional) Makes this server the preferred server that provides
synchronization. The prefer keyword sets this NTP server as the preferred
server if multiple servers have similar accuracy. NTP uses an algorithm to
determine which server is the most accurate and synchronizes to that one. If
servers have similar accuracy, then the prefer keyword specifies which server
to use.
For example, to specify multiple NTP serve
r IP addresses and identify a preferred
server, enter:
host1/Admin(config)# ntp server 192.168.10.10 prefer
host1/Admin(config)# ntp server 1
92.168.4.143
host1/Admin(config)# ntp server 1
92.168.5.10
For example, to form a peer association with a preferred peer, enter:
host1/Admin(config)# ntp peer 192.168.10.0 prefer
To remove an NTP peer or server from the configuration, use the no form of this
command. For example:
host1/Admin(config)# no ntp peer 192.168.10.0
Viewing NTP Statistics and Information
You can configure the ACE to display the following NTP statistics and
information:
• NTP peer statistics
• Input/output statistics
• Counters maintained by the local NTP
• Counters related to the memory code
• Listing of all associated peers
The syntax of this command is as follows:
show ntp {peer
-status | peers | statistics [io | local | memory | peer
ip_address]
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