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But if desired, it is officially supported (albeit a bit unorthodox) to mix a resilient Edge Pool with a single Standard Edition Front End Server. This role will be addressed after the completion of Edge server deployment, but leveraging some of the legacy behavior that is still supported in even the latest Skype for Business clients will allow for at a minimum of external connectivity from Windows Desktop clients and many IP desk phones.

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Understand that while IPv4 addresses in these ranges cannot be routed to the Internet there may be cases where some of these subnetworks are actually in use inside the external firewall.

So any connections to hosts on any subnets within these ranges which can only be reached via the external interface can be handled in one of two ways.

Deploying an Edge Server is a complicated venture as it touches some of the most complex parts and concepts of networking in general.

This article by no means is intended to be a single reference on this topic but is meant to show at least one end-to-end deployment scenario by example.

The externally-facing perimeter network contains a fully-routable public IPv4 subnet.

The best practice approach of leveraging DNS Load Balancing will also be applied to this Edge pool, there will be no complicated Hardware Load Balancers (HLB) to address.

Moving on with this series of deployment articles the next major component of the core Skype for Business (Sf B) infrastructure to address is the Edge Server role.

This server role, from a deployment and architecture standpoint, is basically unchanged from previous Lync Server product releases.

This insures that connections to undefined networks will always go out toward the Internet.

To allows these servers to find and communicate with internal hosts there is a standard accepted practice of defining static routes for all reserved subnet ranges to utilize the internal interface as the target route.

Additional guidance and various accepted best practice guidance is also intermixed throughout where appropriate.

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