$ grep -i gateway /etc/sysconfig/network-scripts/ifcfg-eth0
GATEWAY=<GATEWAY IP Address>
Then you can add the static route.
$ /sbin/route add -host <ASR Manager Server IP Address> gw <GATEWAY IP Address>
Run the tcpdump command from the ASR Manager server to see what notifications are sent in. You will see after the above route changes snmp trap notifications will start to come in from the DB nodes when an test notification is generated from the DB compute nodes.
From the Database compute nodes you can run the exadata_mon_hw_asr.pl command to send to the ASR Manager server and you will see the above message.
Service Request test-create was successful.
Please use My Oracle Support https://support.oracle.com for assistance.
The below table is a reference guide for the ports requirements for the ASR Manager server and also the source, destination, protocol and description information.