Webex Suite Meetings Platform supports Webex App and RoomOS devices on IPv6-only subnets by leveraging DNS64 and NAT64 technologies deployed within the customer’s network or by their network provider.

• Clients and devices detect IPv6-only subnets via DHCP6.
• Communicate with the IPv4-only Webex backend services through NAT64 and DNS64.
• DNS64 synthesizes IPv6 addresses from IPv4 addresses by prefixing the IPv4 address.
• NAT64 translates IPv6 addresses back to IPv4 for backend communication.
• Webex services recognize IPv6 addresses in signaling and use the NAT64-generated IPv4 address for media return.

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

Supported Clients and Devices

Webex App

• Desktop Client: Supported on version 43.9 or later for Windows, MacOS, and Linux.
• Mobile Client: Supported on version 43.9 or later for Android and iOS.
• No additional configuration is required in the Webex App.
• Devices with both IPv4 and IPv6 addresses use IPv4 to communicate with the platform.
• IPv6-only devices use DNS64 to obtain synthetic IPv6 addresses for Webex services.

Webex Web App

• Supported browsers on IPv6 subnets:

  • Google Chrome (last two major versions)

  • Microsoft Edge (last two major versions)
  • Apple Safari (version 17 and later)
• No additional configuration is needed to enable IPv6 support.

RoomOS Devices

• Supported RoomOS devices from version 11.11.1.9 connected to IPv6-only networks.
• Devices on dual-stack networks (IPv4 and IPv6) use IPv4 by default.
• To restrict RoomOS devices to IPv6-onlyfcommunication:
  • Set xConfiguration Network[1] IPStack: IPv6 for all network communication.
  • Alternatively, set xConfiguration Conference Webex CallProtocolIPStack: IPv6 to use IPv6 only for Webex Meetings communication.

Webex Edge Video Mesh

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

Diagnostics

• For Webex App or RoomOS devices on IPv6-only networks, Control Hub displays both the IPv6 local address and the corresponding IPv4 public address provided by NAT64.
• Webex Web App is not yet fully supported in Control Hub diagnostics.

Exclusions

• Webex Web App on Mozilla Firefox is not supported on IPv6 subnets.
• Webex Meetings Virtual Desktop Software is not supported on IPv6 subnets.
• RoomOS integration with ThousandEyes Endpoint Agent is not supported on IPv6-only networks.

Deploying DNS64 and NAT64

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