High Availability

At the High Availability (HA) page you can check straight away your system's status, this is where you will be able to configure the HA definitions and check both the System State and connected Interfaces (Figure 7.11). For more information regarding High Availability please consult Appendix E of this document.

To alter the settings please click on Modify. A new page will appear (Figure 7.12)

Figure 7.11: Advanced Configuration - IPBrick - High Availability

Figure 7.12: High Availability - Modify

• Authentication type (eg IPBrick Master, Secondary Master IPBrick, ...);
• Mode: 'Active/Passive', 'Active/Active' or 'N/A'
  • 'Active/Passive': when there is only an HA interface on one server;
  • 'Active/Active': when there are at least two HA interfaces configured on different servers (note: that this mode is not possible to use failover switches!);
  • N/A - Not applicable or Not available
• Keep-Alive interfaces: interface through which the HA service will communicate between servers (by default will set the eth0 and eth1, if the latter exists).
• Auto Failback: With this option enabled, after a failure, the HA interface that changed server, will return to the original server;
• Fail detection timeout: By default: 10 seconds;
• Initial fail detection timeout: By default: 120 seconds;
• Connectivity nodes: Click on Add to insert a node's IP address. You will also be able to Remove it;
• High availability state (eg. Disabled, Enabled or N/A) says the state of the heartbeat in the system (even when the active HA, for any reason the heartbeat may be giving error)

• Server state (eg. Standby, Active or N/A) - Depending on the state it's possible to acquire or free resources (note that if you are in Active/Active mode it will be possible that two buttons are visible)

• High Availability Interfaces - Table showing the HA interfaces

• Failover switches available - Table showing the failover switches available

Note: At Advanced Configurations > Telephony > Failover switches you may also visualize the switches available.