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SBC SWe N:1 cluster deployments can must be configured in the EMS to use either the OAM node configuration model described in this topic, or the Direct Single model. For . For more information on SBC SWe N:1 deployment requirements, refer to to: 

• Specifying Cluster Configuration Mode Parameters in Heat Deployments if you deploy using Heat templates

• Instantiating SBC SWe on OpenStack using VNFM if you deploy using VNFM
• Using the Ribbon IaC Environment to Deploy SBC SWe on VMware

Refer . Refer to Creating an SBC Cluster for more information on cluster configuration in the EMS.

OAM Node Configuration

When an SBC cluster is operating in OAM configuration mode, the active OAM node holds the active configuration for the cluster and disseminates changes to the SBC nodes in the cluster. To update the configuration of the cluster, you make changes on the active OAM node using either the CLI or the SBC Configuration Manager GUI. Once you save and activate your configuration changes, the OAM node notifies the SBC nodes within the cluster. The SBC nodes collect the configuration change list from the OAM node and apply the changes to their local configuration. The OAM node also saves the configuration revision to the configuration history stored on the EMS.

As you make configuration changes, the OAM node maintains a record of any interim “commit” commands you issue in the CLI or save actions you request on individual pages in the SBC Configuration Manager GUI. However, it does not update the configuration database, notify the nodes to pick up changes, or save the configuration revision on the EMS until you issue an explicit request to save and activate the change. In the CLI, issue a saveAndActivate command. In the GUI, click the Apply Saved Changes and Close button in the top bar of the SBC Configuration Manager window to save and activate your changes. Refer to Modifying SBC Cluster Configuration for details on using either the SBC Configuration Manager or the SBC CLI to configure the cluster.

Node-level Data and Configuration

In an SBC cluster deployment, most configuration settings are common across nodes and are part of the homogeneous configuration that the OAM node propagates to the nodes. However when necessary, you can perform actions or retrieve operational data from individual nodes. A limited number of configurations can also be set on an individual node. To facilitate these node-specific interactions, the SBC configuration model includes a “node” branch when a cluster is operating in OAM configuration mode. The node branch is accessible through either CLI or in the SBC Configuration Manager GUI. Refer to Node-level Data and Configuration for more information on working with the node branch in the configuration model.

Configuration History 

Within the EMS Cluster Management GUI, you can use the cluster configuration history to review the set of configuration changes applied with each save and activate action. It also enables reverting the cluster configuration to a prior revision. Refer to Reviewing Configuration Changes and Reverting Configuration (OAM Mode).