3591983 - Error in SUM during PHASE PREP_CONFIGURATION_DMO/SUBMOD_MIG_CONFIG/HDB_PREPARE

During the Software Update Manager (SUM) Configuration phase for the S/4 conversion of a production system, an issue arises at the step of creating the schema user SAPHANADB. 
Following error can be found in SAPup_troubleticket trace

• SAPup.log

CURRENTPHASE PREP_CONFIGURATION_DMO/SUBMOD_MIG_CONFIG/HDB_PREPARE
...
# Error message set: 'User 'SAPHANADB' could not be created: For more information see logfile tmp/HdbStdout.txt!'

• HDBPREPARE.LOG

2 ETQ399 [START OF HDBSLLIB] using class name 'CREATE_SQL_ROLE_USER_SEQUENCE'
3 ETQ121 <timestamp>: PID <Process ID> execute '~/../jvm/jre/bin/java -cp ~/bin/com.sap.hdb.sl.lib.jar:~/bin/com.sap.hdb.core.jar com.sap.hdb.core.main.cmd.HdbCmdMain HDB_CMD_CLAZZ_NAME=CREATE_SQL_ROLE_USER_SEQUENCE DATABASE_SID=<SID> DATABASE_HOSTNAME=<hostname> INSTANCE_NUMBER=<instance number> JDBC_PATH=~/bin READ_FROM_STDIN=TRUE DATABASE_SQL_USER_NAME=SAPHANADB DATABASE_USER_ROLE=USER ADD_OPTIONS=destvers=758' in background, output written to '/usr/sap/<SID>/SUM/abap/log/HDBSLLIB_PREPARE.LOG'.

• HDBSLLIB_PREPARE.LOG

  com.sap.hdb.sl.lib.connection.sql.JdbcConnection | Start new connection with connect URL: jdbc:sap://<HANA hostname>:3<instance number>13/?databaseName=<tenant SID> connect user: SYSTEM
  com.sap.hdb.core.main.cmd.HdbCmdMain | Error during execution of HdbCmdClazz section!
  com.sap.hdb.core.main.cmd.HdbCmdMain | com.sap.db.jdbc.exceptions.JDBCDriverException: SAP DBTech JDBC: Cannot connect to jdbc:sap://<HANA hostname>:3<instance number>13/ [Cannot connect to host /AAA.AAA.AAA.AAA:30815; socket timeout [null], -813.: (uninitialized) -> AAA.AAA.AAA.AAA:30815 ConnectionID:0 SessionID:0].

HANA 2.0

SUM, S/4 conversion, schema user, SAPHANADB, user creation failed, hostname resolution, use_default_route, HANA. , KBA , HAN-LM-INS-SAP , Installation of SAP Systems on HANA , HAN-DB , SAP HANA Database , How To