Set Up Basic Realm-Specific IP Configuration

Describes how to edit the configuration worksheet for the Cray RSIP (realm-specific IP) service.

This procedure assumes the following:

This system will use RSIP, that is, it has one or more service nodes that will provide the RSIP service.
Advanced RSIP configuration (e.g., RSIP failover, RSIP pools) is not needed.

RSIP (realm-specific IP) helps to maintain packet integrity by allowing an RSIP host to borrow one or more IP addresses from a set of configured RSIP gateways. This procedure configures some settings in the Cray RSIP configuration service worksheet to add site-specific data for a basic RSIP configuration. If advanced RSIP configuration is needed, use Set Up Advanced RSIP Configuration on a Booted System instead of this procedure.

Edit cray_rsip_worksheet.yaml.
```
smw# vi cray_rsip_worksheet.yaml
```
Uncomment cray_rsip.enabled and set it to true.
Enter the node group (or groups) of the nodes that will be RSIP servers on this system.
To create one or more node groups that contain the RSIP server nodes (by cname) for this system (rsip_nodes in this example), edit cray_node_groups_worksheet.yaml.
Uncomment cray_rsip.settings.service.data.server_groups, remove the empty list ([]), and add the node group(s) on separate lines prefixed by a hyphen and space (- ).
```
cray_rsip.settings.service.data.server_groups:
- rsip_nodes
```
Enter the node group (or groups) of the service nodes that will be RSIP clients on this system, such as a MOM node.
To create one or more node groups that contain the RSIP client nodes (by cname) for this system (rsip_servicenode_clients in this example), edit cray_node_groups_worksheet.yaml.
Uncomment cray_rsip.settings.service.data.node_groups_as_client, remove the empty list ([]), and add the node group(s) on separate lines prefixed by a hyphen and space (- ).
```
cray_rsip.settings.service.data.node_groups_as_client:
- rsip_servicenode_clients
```
Set cray_rsip.settings.service.data.use_xtrsipcfg to false.