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NEC's award-winning ExpressCluster is a family of integrated high availability and disaster recovery software providing fast recovery and continuous protection of business critical applications and data. ExpressCluster enables easy to deploy and cost effective continuity solutions for industry standard database, email, and virtualization applications and platforms including MS SQL, Oracle DB, IBM DB2, MySQL, MS Exchange, Sendmail, VMware, MS Virtual Server, Windows, and Linux.

Security Notice - Multiple Vulnerabilities in ExpressCluster X

How to replace a VCOM resource with a DDNS resource in ExpressCluster

  1. Stop the failover group.
  2. Open the ExpressCluster web-manager and switch to config mode.
  3. Highlight the Failover group, right click on the VCOM resource and click "Remove Resource".
  4. Right click on the failover group and click "Add Resource".
  5. For the "Type" section, select "dynamic dns resource" from the dropdown list, chose a name for the resource, and click next.
  6. Chose the dependency chain and click next. Note: if there is not a custom dependency, checking the default dependency checkbox should be fine.
  7. On the following screen, select your recovery options and click next. Note: Unless custom recovery options are required, the defaults should be acceptable.
  8. On the next screen, supply the following information
    1. Virtual Host Name
      • This is the new hostname of the cluster to be registered with DNS. Unless you are changing the hostname, this should be the same name as the previous VCOM name. NOTE: You will need to fully qualify the hostname.
    2. IP Address
      • If using a floating IP, supply the FIP address. If not using an FIP, supply the ip address of the primary server.
    3. DDNS Server
      • This should contain the IP address of main the DNS server.
    4. Port No.
      • The port number of the DNS server (default is port 53).
    5. Cache TTL
      • Chose and integer between 0 and 2147483647.
    6. Update Interval
      • Specify how often you would like the DNS record to be updated/re-registered. The default is 60 seconds.
    7. Kerberos Authentication
      • Check this check box if you wish to use Kerberos Authentication
  9. Select the tab of one of the servers at the top of the window, click the "Set Up Individually" check box and specify the public IP address of the selected server.
  10. Repeat step 9 for all other servers/tabs listed.
  11. Click Finish
  12. Click File-Apply Configuration File.
  13. Switch the webmanager back to "Operation Mode"
  14. Restart the failover group.
  15. Ping the ddns hostname name to make sure that it resolves to the active server.
  16. Move the failover group to the standby server and ping the ddns hostname once again to make sure that it has changed to resolve to the newly active server.

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