How To Remove Interface on Shared Network in Order to Change the Default Gateway to an IP Network Interface (Doc ID 2393893.1)

Last updated on MARCH 12, 2021

Applies to:

Goal

This KM article will explain how to remove the network interface on the Shared Network in order to be able to effectively change the default gateway to be one of the IP Network interfaces.

Note that if an OCI-C (Oracle Cloud Infrastructure Classic) Compute instance has an interface on the Shared Network this vNIC / network interface will be the default gateway for traffic not matching explicitly defined routes. If the Compute Classic instance has one or interfaces on IP Networks then none of those network interfaces can be configured as a default gateway until the shared network interface is removed.

Typical use case for removing the network interface on the Shared Network:

• The Compute Classic instance was wrongly configured when created to have such an interface instead of interface(s) only on IP Network(s).
• The default gateway needs to changed so that by default all traffic not matching explicitly defined routes at the OS level, can be directed through a different network interface, a network interface on an IP Network.
• The Compute Classic instance needs to have a static private IP.
• The Compute Classic instance needs to be reached through VPN from customer premises and it is connected through an IP Network to the dual-homed Corente VPN Gateway or VPNaaS CSG (Corente Services Gateway).

Solution