Under normal operation, xHA automatically fails over in the event of a hardware, network or service failure related to the Active node. However, you can perform a manual xHA failover for maintenance or verification purposes.
Warning: BlueCat advises customers to never perform a manual xHA failover immediately after modifying the network and interface configurations of an xHA pair (such as the xHA backbone, additional IP service addresses, or VLAN interfaces). Doing so can result in loss of the modified data. If the manual xHA failover must be performed after changing interface or network configurations, allow several minutes for the data to synchronize between the Active and Passive nodes of an xHA pair before performing manual xHA failover. For more information, refer to the Knowledge Base article https://care.bluecatnetworks.com/kA540000000L1KR on BlueCat Customer Care.
When you perform an xHA failover manually, the roles of the servers in the xHA pair are reversed: the Passive server becomes the Active node, and the formerly active server becomes the Passive node.
If a server is disconnected, the Failover function is unavailable for use.
To perform an xHA failover:
- Select the Servers tab. Tabs remember the page you last worked on, so select the tab again to ensure you're on the Configuration information page.
- From the configuration drop-down menu, select a configuration.
- Under Servers, click the xHA pair.
- Click the xHA pair name menu and select Failover.
Review the information in the xHA and
Failover sections of the page:
- The xHA section lists the name and server profile of the pair.
- The Failover section lists the individual servers, their connection status, their active or passive state in the pair, and their IP addresses. If Dedicated Management is enabled, this section lists the IP address of the Management interface (by default, eth2).
- Under Change Control, add comments, if required.
- Click Failover.