Both nodes in an HA configuration maintain
a counter called incarnation number
counts the number of configurations in the node's configuration
file. Each node sends its incarnation number to each other node in
the heartbeat messages.
The incarnation number is not incremented for the following
- All HA configuration related commands. For example, add ha node,
set ha node, and bind ha node.
- All Interface related commands. For
example, set interface and unset interface.
- All channel-related commands. For
example, add channel, set channel, and bind channel.