Suspend and Resume High Availability

You can suspend a unit in a high-availability pair, which is useful when:

• Both units are in an active-active situation, and fixing the communication on the failover link does not correct the problem.

• You want to troubleshoot an active or standby unit and do not want the units to fail over during that time.

When you suspend high availability, the currently active device remains active, handling all user connections. However, failover criteria are no longer monitored, and the system will never fail over to the now pseudo-standby device.

When using a data interface for manager access, the management connection will be broken until after you resume.

The key difference between suspending high availability and breaking high availability is that on a suspended high-availability device, the high-availability configuration is retained. When you break high availability, the configuration is erased. Thus, you have the option to resume high availability on a suspended system, which enables the existing configuration and makes the two devices function as a failover pair again.

To suspend high availability, use the configure high-availability suspend command.

> configure high-availability suspend
Please ensure that no deployment operation is in progress before suspending 
high-availability.
Please enter 'YES' to continue if there is no deployment operation in 
progress and 'NO' if you wish to abort: YES
Successfully suspended high-availability.

If you suspend high availability from the active unit, the configuration is suspended on both the active and standby units. The standby unit interface configuration is also erased. If you suspend it from the standby unit, it is suspended on the standby unit only, but the active unit will not attempt to fail over to a suspended unit.

To resume failover, use the configure high-availability resume command.

> configure high-availability resume
Successfully resumed high-availablity.

You can resume a unit only if it is in Suspended state. The unit will negotiate active/standby status with the peer unit.