The supported clients and devices discover that they are on an IPv6-only subnet (using DHCP6 protocol). They communicate with the IPv4-only Webex Suite Meeting Platform using NAT64 and DNS64 within the customer's network.

Clients and devices on an IPv6-only subnet communicate with Webex Suite Meeting Platform backend services using DNS64-provided IPv4 addresses for those services. DNS64 prefixes the destination IPv4 address to form an IPv6 address. NAT64 translates the IPv6 address to the IPv4 address of the Webex Meeting backend server.

Webex services recognize the presence of IPv6 addresses in signaling from the supported client or device. It then uses the source IPv4 address generated by NAT64 as the return address for media sent by the server to the IPv6 client (or device).

The solution supports Webex Suite Meetings Platform cloud services, including Webex Edge Video Mesh, which requires additional configuration.

Webex App

The Webex App Desktop Client registered to an IPv6 subnet is supported on version 43.9 or later on Windows, MacOS, and Linux.

The Webex App Mobile Client registered to an IPv6 subnet is supported on version 43.9 or later on Android or iOS.

There’s no additional configuration required in the Webex App. This feature is used by any supported client with only an IPv6 address if the customer’s DNS64 returns a synthetic IPv6 address for Webex Suite Meetings Platform services.

The Webex App on a device that has both IPv4 and IPv6 addresses uses the IPv4 address to communicate with the Webex Suite Meetings Platform.

Webex Web App

The Webex Web App running on a device on an IPv6 subnet is supported in the following browsers:

• Google Chrome (last two major versions)

• Microsoft Edge (last two major versions)
• Apple Safari (version 17 and later)

There’s no additional configuration required in the Webex Web App to enable IPv6 support on the Webex Suite Meetings Platform. But Webex Edge Video Mesh requires additional configuration to support the Webex Web App on an IPv6 network.

RoomOS

RoomOS devices connected to an IPv6-only network are supported by the Webex Suite Meetings Platform in a similar way to the Webex App, from version 11.11.1.9.

RoomOS devices connected to a network that provides both IPv4 and IPv6 addresses use the IPv4 address to communicate with the Webex Suite Meeting Platform. On such a network, the RoomOS device may be restricted to use only an IPv6 address (for all network communication) by setting the following configuration:

Alternatively, the RoomOS device may be restricted to use only its IPv6 address in its communication with Webex Meetings (and IPv4 for all other network communication) by setting the following configuration:

Webex Edge Video Mesh

For Webex Edge Video Mesh to support the Webex Web App from IPv6-registered devices, the Webex Edge Video Mesh must have a Full Qualified Domain Name (FQDN). This can be set up at initial deployment, or added later by following the instructions here.

Diagnostics

For a Webex App or RoomOS device on an IPv6-only network, Control Hub shows an IPv6 local address and the corresponding IPv4 public address provided by the NAT64. Webex Web App isn’t yet fully supported in Control Hub.

Exclusions

The Webex Web App running on Mozilla Firefox is not supported to join Webex Meetings from an IPv6 subnet.

The Webex Meetings Virtual Desktop Software is not supported from an IPv6 subnet.

The RoomOS integration of ThousandEyes Endpoint Agent is not supported in an IPv6-only network.

Deploying DNS64 and NAT64

You can find more information on DNS64 and NAT64 here: Understand And Configure DNS64 and NAT64.