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How to Calculate the Correct Subnet For an Interface (Doc ID 1059759.1)

Last updated on SEPTEMBER 24, 2019

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.


How to calculate the correct subnet to use in oifcfg, etc.

oifcfg requires you to enter the subnet used for public and cluster_interconnect networks.
However, ifconfig usually shows the IP and the netmask, but not the subnet.
This note will show how to determine the subnet to be used with oifcfg.
More generally, it also applies to the general question of determining the subnet for a given interface, given the IP address and netmask.


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