This section describes how to configure the Rhino VoLTE TAS - that is, the processes of making and applying configuration changes.

It is not intended as a full checklist of the steps to take during an upgrade or full installation - for example, business level change-control processes are not discussed.

The configuration process is based on modifying configuration files, which are validated and sent to a central configuration data store (CDS) using the rvtconfig tool. The nodes in the Rhino VoLTE TAS will poll the CDS, and will pull down and apply any changes.

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Initial setup

The initial configuration process starts with the example YAML files distributed alongside the Rhino VoLTE TAS, as described in Example configuration YAML files.

Note Metaswitch strongly recommends that the configuration files are stored in a version control system (VCS). A VCS allows version control, rollback, traceability, and reliable storage of the system’s configuration.

If a VCS is not a viable option for you, it is still required and your responsibility every time a change is needed to take backups of the configuration before making any changes. In this case, the recommended approach is to store the full set of configuration files in a reliable cloud storage system (e.g. OneDrive) and to keep the backups in different folders named with a progressive number and a timestamp of the backup date (e.g. v1-20210310T1301).

The rest of the guide is written assuming a VCS is being used to manage the configuration files.

Initially, add the full set of example YAMLs into your VCS as a baseline, alongside the solution definition files (SDFs) described in the RVT VM install guides. You should store all files (including the SDFs for all nodes) in a single directory yamls with no subdirectories.

Making changes

The first step to changing the system configuration is to edit the configuration files, making the desired changes (as described in this guide). You can do this on any machine using a text editor (one with YAML support is recommended). After you have made the changes, they should be recorded to the VCS.

Validating the changes

On the SIMPL VM, as the admin user, change to the directory /home/admin/. Check out (or copy) your yamls directory to this location, as /home/admin/yamls/.

Note If network access allows, it is recommended to retrieve the files directly from the VCS into this directory, rather than copying them. Having a direct VCS connection means that changes made at this point in the process are more likely to be committed back into the VCS, a critical part of maintaining the match between live and stored configuration.

At this point, use the rvtconfig tool to validate the configuration used for all relevant nodes.

Note For more information on the rvtconfig tool, see rvtconfig reference.

The relevant nodes depend on which configuration files have been changed. To determine the mapping between configuration files and nodes, consult Example configuration YAML files in the install guide for:

The rvtconfig tool is delivered as part of the VM image CSAR file, and unpacked into /home/admin/.local/share/csar/<csar name>/<version>/resources/rvtconfig.

Important It is important that the rvtconfig binary used to validate a node’s configuration is from a matching release. That is, if the change is being made to a mag node which is at version x.y.z-p1, the rvtconfig binary must be from a version x.y.z CSAR.

For example, assume a change has been made to the home-network-config.yaml file in a CDMA network. This would require reconfiguration of the smo, mmt-cdma and mag nodes, with all nodes at version 4.0.0. To validate this change, use the following commands from the /home/admin/ directory.

./.local/share/csar/mmt-cdma/4.0.0/resources/rvtconfig validate -t mmt-cdma -i ./yamls
./.local/share/csar/smo/4.0.0/resources/rvtconfig validate -t smo -i ./yamls
./.local/share/csar/mag/4.0.0/resources/rvtconfig validate -t mag -i ./yamls

If any of the nodes fail validation, update the files to fix the errors as reported, and record the changes in your VCS.

Uploading the changes

Once the file is validated, record the local changes in your VCS.

Next, use the rvtconfig upload-config command to upload the changes to the CDS. As described in Uploading configuration to CDS with upload-config, the upload-config command requires a number of command line arguments.

The full syntax to use for this use case is:

rvtconfig upload-config -c <cds-ip-addresses> -t <node type> -i <config-path> --vm-version <vm_version>


  • <cds-ip-addresses> is the signaling IP address of a TSN node

  • <deployment-id> can be found in the relevant SDF

  • <node type> is the node being configured, as described above

  • <config-path> is the path of the directory containing the YAML and SDFs

  • <vm_version> is the version string of the node being configured

As with validation, the rvtconfig executable must match the version of software being configured. Take the example of a change to the home-network-config.yaml as above, on a CDMA network with nodes at version 4.0.0, a deployment ID of prod, and a CDS at IP In this environment the configuration could be uploaded with the following commands (from /home/admin/:

./.local/share/csar/mmt-cdma/4.0.0/resources/rvtconfig upload-config -c -t mmt-cdma -i ./yamls --vm-version 4.0.0
./.local/share/csar/smo/4.0.0/resources/rvtconfig upload-config -c -t smo -i ./yamls --version--vm-version 4.0.0
./.local/share/csar/mag/4.0.0/resources/rvtconfig upload-config -c -t mag -i ./yamls --vm-version 4.0.0

Verifying the changes

Once the upload is completed, the software on the VMs will apply the configuration from the CDS. You can verify this by monitoring the system logs on the relevant nodes.

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Rhino VoLTE TAS Version 4.0.0