question: public boolean areNodesReachable ( List < VdcConfig > vdcList , boolean isAllNotReachable ) { if ( vdcList == null || vdcList . isEmpty ( ) ) { throw new IllegalStateException ( "No vdc's passed in node reachable check request" ) ; } for ( VdcConfig vdc : vdcList ) { if ( ! areNodesReachable ( vdc . getShortId ( ) , vdc . getHostIPv4AddressesMap ( ) , vdc . getHostIPv6AddressesMap ( ) , isAllNotReachable ) ) { return false ; } } return true ; }
target:  tries to connect to each node in each vdc