Cisco ACE-4710-K9 Administration Guide - Page 48
Configuring NTP Server and Peer Associations - show configuration context
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Synchronizing the ACE with an NTP Server Chapter 1 Setting Up the ACE This section contains the following topics: • Configuring NTP Server and Peer Associations • Viewing NTP Statistics and Information • .Clearing NTP Statistics Configuring NTP Server and Peer Associations An NTP association can be a peer association, which means that the ACE is willing to synchronize to the other system or to allow the other system to synchronize to the ACE. An NTP association can also be a server association, which means that only this system will synchronize to the other system, not the other way around. You can identify multiple servers; the ACE uses the most accurate server. To configure the ACE system clock to synchronize a peer (or to be synchronized by a peer) or to be synchronized by a time server, use the ntp command. The syntax of this command is as follows: ntp {peer ip_address1 [prefer] | server ip_address2 [prefer]} Note Only users authenticated in the Admin context can use the ntp peer and ntp server commands. The keywords, arguments, and options are: • peer-Configure the ACE system clock to synchronize a peer or to be synchronized by a peer. You can specify multiple associations. • ip_address1-IP address of the peer providing or being provided by the clock synchronization. • prefer-(Optional) Makes this peer the preferred peer that provides synchronization. Using the prefer keyword reduces switching back and forth between peers. • server-Configures the ACE system clock to be synchronized by a time server. You can specify multiple associations. • ip_address2-IP address of the time server that provides the clock synchronization. 1-22 Cisco 4700 Series Application Control Engine Appliance Administration Guide OL-11157-01