Tag Archives: NTP

Configure NTP on AIX 7.1 for Oracle RAC

  1. Verify that you have a server suitable for synchronization. Enter:
  1. # ntpdate -d ip.address.of.server

    The offset must be less than 1000 seconds for xntpd to synch. If the offset is greater than 1000 seconds, change the time manually on the client and run the ntpdate -d again.

    If you get the message, "no server suitable for synchronization found", verify xntpd is running on the server (see above) and that no firewalls are blocking port 123.

  2. Specify your xntp server in /etc/ntp.conf, enter:
  1. # vi /etc/ntp.conf

    (Comment out the “broadcastclient” line and add server ip.address.of.server prefer.)Leave the driftfile and tracefile at their defaults.

  2. Start the xntpd daemon:
  1. # startsrc -s xntpd

    (Use the -x flag if it is appropriate for your environment.)

  1. Uncomment xntpd from /etc/rc.tcpip so it will start on a reboot.
  1. # vi /etc/rc.tcpip

    Uncomment the following line:

    start /usr/sbin/xntpd "$src_running" "-x"

    NOTE: Use the -x flag to prevent the clock from changing in a negative direction.

  2. Verify that the client is synched.
  1. # lssrc -ls xntpd

    NOTE: Sys peer should display the IP address or name of your xntp server. This process may take up to 6 minutes.

in IBM Support

ATENTION!!!

Check your Time Zone settings. We had to change to our Time Zone (Lisbon).

The default value is CST6DST. Run the commad:

smit chtz_user

and change the values to GMT0WET.

Here’s a list of the values you can use: http://pic.dhe.ibm.com/infocenter/aix/v6r1/index.jsp?topic=%2Fcom.ibm.aix.files%2Fdoc%2Faixfiles%2Fenvironment.htm

I hope it was useful!!!
Cheers

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