Dell PowerProtect Cyber Recovery 19.12 Installation Guide

Configuring Docker subnets on Cyber Recovery deployments

Assign specific Docker network subnets on existing Cyber Recovery deployments or during installation to avoid possible conflicts.

At installation, the Cyber Recovery software creates the Docker cr_back and cr_front networks, which contain and isolate the Docker containers that run as part of the Cyber Recovery deployment.

By default, Docker creates bridge interfaces for these networks and the docker0 interface, and then assigns the 172.x subnet ranges, typically starting with 172.17.x, 172.18.x, and so on. These Docker IP ranges might conflict with your environment. If subnets in the Cyber Recovery vault conflict with any of these Docker subnets, the Cyber Recovery software is prevented from configuring any assets that are assigned to the conflicting Cyber Recovery vault subnet.

You can assign specific Docker subnets during the initial Cyber Recovery installation or Cyber Recovery virtual appliance deployment, or readdress the subnets on existing deployments. To readdress Docker subnets on an existing deployment, see Readdressing the Docker network on an existing Cyber Recovery deployment