Polycom 3725-76302-001LI manual Single-server Configuration, Superclustering

DMA Operations Guide Introduction to the Polycom DMA System

Single-server Configuration

The Polycom DMA system is also available in a single-server configuration. This configuration offers all the advantages of the Polycom DMA system except the redundancy and fault tolerance at a lower price. It can be upgraded to a two-server cluster at any time.

This manual generally assumes a redundant two-server cluster. Where there are significant differences between the two configurations, those are spelled out.

Superclustering

To provide geographic redundancy and better network traffic management, up to five geographically distributed Polycom DMA system clusters (two- server or single-server) can be integrated into a supercluster. All five clusters can be Call Servers (function as gatekeeper, SIP proxy, SIP registrar, and gateway). Up to three can be designated as Conference Managers (manage an MCU resource pool to host conference rooms).

The superclustered Polycom DMA systems can be centrally administered and share a common data store. Each cluster maintains a local copy of the data store, and changes are replicated to all the clusters. Most system configuration is supercluster-wide. The exceptions are cluster-specific or server-specific items like network settings and time settings.

Note

Technically, a standalone Polycom DMA system (two-server or single-server) is a supercluster that contains one cluster. All the system configuration and other data that’s shared across a supercluster is kept in the same data store. At any time, another Polycom DMA system can be integrated with it to create a two-cluster supercluster that shares its data store.

It’s important to understand the difference between two co-located servers forming a single DMA system (cluster) and two geographically distributed DMA clusters (single-server or two-server) joined into a supercluster.

A single two-server DMA system (cluster) has the following characteristics:

•A single shared virtual IP address and FQDN, which switches from one server to the other when necessary to provide local redundancy and fault tolerance.

•A single management interface and set of local settings.

•Ability to manage a single territory, with no territory management backup.

•A single set of Call Server and Conference Manager responsibilities.

A supercluster consisting of two DMA clusters (single-server or two-server) has the following characteristics:

•Separate IP addresses and FQDNs for each cluster.

•Separate management interfaces and sets of local settings for each cluster.

•Ability for each cluster to manage its own territory, with another cluster able to serve as backup for that territory.

•Different Call Server and Conference Manager responsibilities for each territory and thus each cluster.

6 Polycom, Inc.