If Connection Manager failover arbitration is not configured, a secondary server
can be converted to the primary server using the onmode -d make primary
command. Enterprise Replication will connect to the new primary server. If the
primary server within a high-availability cluster fails, the secondary server can be
switched to standard mode by executing the onmode –d standard command.
However, you must manually start Enterprise Replication by executing the cdr
start command on that server. This is necessary to prevent Enterprise Replication
from starting on all servers in cluster.