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Overview of IP address types for Lync Server 2013

Lync Server 2013
 

Topic Last Modified: 2013-01-29

You have three options when configuring IP addresses in Lync Server 2013. You can configure Lync Server 2013 to support only IP version 4 (IPv4), only IP version 6 (IPv6), or a combination of both (known as a dual stack). There are several issues to consider with each type of configuration:

  • IPv4 only   IPv6 was created because the world is running out of IPv4 addresses. Ultimately, IPv6 will be fully supported worldwide, but at this time, many companies and devices that your enterprise might need to communicate with do not yet support IPv6, and may not for some time. An IPv4-only configuration will help to ensure that your Lync Server implementation can communicate with most existing devices.

  • IPv6 only   Conversely, a full IPv6 implementation, at this time, will exclude communication with many existing devices.

  • Dual Stack   Dual stack is a network where both IPv4 and IPv6 addresses are enabled. This configuration is supported in Lync Server 2013 because in most cases the transition from full-IPv4 to full-IPv6 will take several years.

The following sections outline the compatibility among these three configurations for various Lync Server features.

noteNote:
Client or server configuration with IPv6 only is supported only for lab or validation purposes. IPv6 only configuration is not supported in the production deployment.

 

Client endpoint network Server network

IPv4

IPv4

IPv4

Dual stack

Dual stack

IPv4

Dual stack

Dual stack

Dual stack

IPv6

IPv6

Dual stack

IPv6

IPv6

Peer-to-peer communications include audio, audio/video, application sharing, and file transfer. After both clients have successfully registered, the following combinations are supported.

 

Client endpoint 1 Client endpoint 2

IPv4

IPv4

IPv4

Dual stack

Dual stack

Dual stack

IPv6

Dual stack

IPv6

IPv6

Conferencing includes audio/video, application sharing, and data collaboration (whiteboarding and file sharing).

 

Client endpoint network Server network

IPv4

IPv4

IPv4

Dual stack

Dual stack

IPv4

Dual stack

Dual stack

Dual stack

IPv6

IPv6

Dual stack

IPv6

IPv6

Lync Server 2013 does not support media bypass for public switched telephone network (PSTN) calls if the traffic is through an IPv6 interface. If media bypass is required, we recommend that the PSTN gateway is configured to IPv4.

 

Primary interface* PSTN interface (on Mediation Server) PSTN gateway setting

IPv4

Dual stack

IPv4

Dual stack

Dual stack

IPv4

Dual stack

Dual stack

IPv6

* The primary interface is the interface that communicates with the Lync Server components.

Peer-to-peer communications with remote users include instant messaging, audio/video, application sharing, and file transfer.

 

Remote user network Edge server (External edge)

IPv4

IPv4

Dual stack

IPv4

Dual stack

Dual stack

IPv6

Dual stack

IPv6

IPv6

The following table shows the support matrix between the Front End Server pool and the internal Edge Server pool.

Front End Pool and Edge Pool (Internal Edge) Matrix

Edge Pool: IPv4

Edge Pool: Dual Stack

Edge Pool: IPv6

Front End Pool: IPv4

Yes

Yes

No

Front End Pool: Dual Stack

Yes

Yes

No

Front End Pool: IPv6

No

No

Yes*

* Use this combination only in a lab environment.

The following table is a matrix of the supported combinations of internal and external edge interfaces.

Edge Pool (Internal Edge) and Edge pool (External Edge) Matrix

Edge Pool (External Edge) : IPv4

Edge Pool (External Edge): Dual Stack

Edge Pool (External Edge): IPv6

Edge Pool (Internal Edge): IPv4

Yes

Yes

No

Edge Pool (Internal Edge): Dual Stack

No

Yes

No

Edge Pool (Internal Edge): IPv6

No

No

Yes*

* Use this combination only in a lab environment.

Deployments that include call admission control (CAC), Enhanced 9-1-1 (E9-1-1), or media bypass must be configured as IPv4 only or as a dual-stacked implementation.

noteNote:
In a dual-stacked deployment, even if a Lync client connects to a Lync Server by using IPv6, Lync will make a best effort to map an appropriate IPv4 address to support E9-1-1.

Location Information service with IPv6 addresses is not supported.

Exchange Unified Messaging (UM) does not support IPv6. For Exchange UM, be sure that DNS resolution does not return an IPv6 address. Using IPv6 may cause failure when calls are sent to voice mail.

In addition to the features and components mentioned previously, Lync Server 2013 supports IPv6 for the following features:

  • Persistent Chat

    You configure IPv6 for Persistent Chat by using Topology Builder. For details about configuring Persistent Chat, see the Deploying Persistent Chat Server documentation.

  • Quality of Experience (QoE) and call detail recording (CDR) reports

    Monitoring reports include the IP address as it is stored in the Monitoring Server database, whether of type IPv4 or IPv6.

 
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