In working with some SA4500's it seems there definately is a bug for failing back to the primary device. Sometimes it works, other times it doesn't. One thing to note about the SA4500's is you should not need to restart the cluster. If you change the sync rank and click the update button, the devices "should" sync and make the appropriate device the leader. Just as an FYI here is the description of the sync rank column in the clustering status tab provided by Juniper: Specifies the synchronization order for nodes when rejoining a cluster. Accepts sync ranks from 0 (lowest rank) to 255 (highest rank). The highest rank takes precedence. Where two nodes have identical sync ranks, the alpha-numeric rank of the member name is used to determine precedence. ... View more