Cisco DNCS System Release 2.7 3.7 4.2 Guía De Instalación
78-4011510-01 Rev C
Configure an NTP Server
3-5
Configure an NTP Server,
Continued
3.
Click xterm.
Result: The xterm window opens.
Result: The xterm window opens.
4.
Verify network connectivity and the status of each NTP server from the
DNCS. Type the following and press Enter:
$ /usr/local/xntpd/ntpdate –d 192.168.2.20
$ /usr/local/xntpd/ntpdate –d 192.168.2.20
$ /usr/local/xntpd/ntpdate –d 132.163.4.102
Notes:
•
Notes:
•
For the purpose of this document, we are using the IP address 192.168.2.20
as the NTP server. This IP address is the default IP address of the Cisco
Services VPN connection. If you have a Cisco VPN connection, the Cisco
VPN router can serve as your time source.
•
The second IP address listed above is the IP address for an actual NTP
server.
Result: The system should respond with both transmit and receive packets
followed by time information sent from the NTP server. If the final line of
output states “no server suitable for synchronization found,” then either a
problem exists with that NTP server or a network issue is preventing a
connection. Verify the IP address with your Network Administrator and
attempt the command listed above again. If you are unable to resolve this
problem, check your network routing. If you are still unable to resolve this
problem, contact Cisco Services for assistance.
Important: Do not proceed to step 5 until you are able to communicate with
Important: Do not proceed to step 5 until you are able to communicate with
the NTP server.
5.
Log in as root user and use the UNIX vi editor to insert a line for each
additional NTP server at the end of the /etc/hosts file:
192.168.2.20 NTPserver1
192.168.2.20 NTPserver1
132.163.4.102 NTPserver2
Notes:
•
Notes:
•
The first IP address shown is the address typically used for the VPN
router. Use this address or the IP address supplied by your Network
Administrator.
•
You can also include additional NTP server entries in the /etc/hosts file.
Result: The DNCS will now recognize the NTP server(s) by both server
name(s) (NTPserver1 and NTPserver2) and by IP address(es).