OCI Network Firewall - Palo Alto VM Series - Transit Routing Using DRG2

 https://docs.oracle.com/en/solutions/oci-network-firewall/#GUID-875E911C-8D7D-4205-952B-5E8FAAD6C6D3

https://docs.oracle.com/en-us/iaas/Content/Network/Tasks/transitrouting.htm