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IPv6 plan in Skype for Business
Summary: Implement IPv6 before installing Skype for Business Server.
Skype for Business Server includes support for IP version 6 (IPv6) addresses, along with continued support for IP version 4 (IPv4) addresses.
IPv4 addresses are 32-bit addresses that allow computers to communicate over the Internet. Due to the increasing number of devices around the world, the available IPv4 addresses have been exhausted. For this reason, many new devices are moving to use IPv6 addresses. IPv6 addresses perform the same function as IPv4 addresses (with a few extra features), but instead of just using 32 bits, they use 128 bits. This not only provides a new set of addresses, but also a much larger number of them.
Typical IPv4 addresses look like this: 192.0.2.235, while IPv6 addresses look like this: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The change in the format and functionality of devices that use IPv6 addresses requires several implementation and configuration considerations in the installation of Skype for Business Server.
This topic includes the following sections:
- Introduction to types of IP addresses
- Technical requirements for IPv6
- Migration and coexistence considerations for IPv6
If you determine that you will be using IPv6 addresses, see the Configure IP address types in Skype for Business article.
Introduction to types of IP addresses
You have three options when configuring IP addresses in Skype for Business Server. You can configure Skype for Business Server to support only IP version 4 (IPv4), only IP version 6 (IPv6), or a combination of both (known as dual stack). Each configuration type has several things to consider:
- Only IPv4 IPv6 was created because the world is running out of IPv4 addresses. Ultimately, IPv6 will be fully supported around the world, but right now, many businesses and devices that your business might need to communicate with don't yet support IPv6 and may not for some time. An IPv4-only setting will help ensure that your Skype for Business Server deployment can communicate with most existing devices.
- IPv6 Only In contrast, a full IPv6 implementation will preclude communication with many existing devices.
- A dual stack is a network where both IPv4 and IPv6 addresses are enabled. This configuration is supported in Skype for Business Server because, in most cases, the transition from full IPv4 to full IPv6 will take several years.
The following sections describe the compatibility between these three configurations for various features of Skype for Business Server.