Amer Networks E5Web GUI - Manual (Page 714)

Both Units Going Active
In the case of a misconfiguration of an HA cluster, a worst case scenario could arise where both
the master and slave think the other unit has failed and both can go active at the same time
resulting in the failure of correct traffic flow.
This is usually identified by examining the log messages generated by both units. An
active-active situation might be caused by unused interfaces not having heartbeats turned off
(as discussed previously) or possibly a connection problem such as the sync interfaces not being
able to communicate.
IPv6 Support
Support for IPv6 addresses is discussed in Section 3.2, “IPv6 Support”.
Chapter 11: High Availability
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