IPv6 support

Last Updated : Mar 03, 2021 |

Communication Manager supports dual stack. Therefore, Communication Manager can be simultaneously connected with endpoints and entities that use IPv4 and IPv6 addresses.

Communication Manager supports IPv6 solution for SIP endpoints.

Communication Manager supports the following features:

  • Enhancing the support for IPv6, by introducing the Alternate Network Address Type (ANAT) mechanism to achieve media level interworking between IPv4 and IPv6.

  • Supporting IPv6 address family for negotiation of media parameters with SIP entities such as SIP phones.

  • Supporting IPv6 to establish connection with far-end SIP entity.

  • Allowing the selection of IPv6 or IPv4 or Dual Stack media resource depending on Communication Manager configuration and far-end capabilities.

Note:

When you configure ANAT with preference IPv6 and IPv4 and configure a SIP trunk from Communication Manager 7.1.x or later to Communication Manager 7.0, then the outgoing call from Communication Manager 7.1.x or later to Communication Manager 7.0 will not work.

Note:

If you set the Intra-region IP-IP Direct Audio or the Inter-region IP-IP Direct Audio field to n, the outgoing call gets dropped.

Note:

When using 96xx or 96x1 (pre-7.1 firmware) deskphones with Communication Manager supporting dual stack media and using the preference IPv6/IPv4, set one of the following fields to avoid loop detection:

  • Set the Loop Detection Mode field to off.

  • Set the Loop Count Threshold field to 7.

To set these fields on the System Manager web console, navigate to Elements > Routing > SIP Entities.