Cluster peer unvailable after AFF-A300 to AFF-A400 head swap
Applies to
- AFF-A300
 - AFF-A400
 - HeadSwap
 
Issue
Following HeadSwap from AFF-A300 to AFF-A400 controllers snapmirror update hangs at 0kb transferred and cluster peer show says 
Unavailable.ClusterA::> cluster peer show
Peer Cluster Name         Cluster Serial Number Availability   Authentication
------------------------- --------------------- -------------- --------------
ClusterDR                 1-80-000099           Unavailable    ok
