Polycom 3725-76302-001O manual Embedded DNS, Column

Call Server Configuration

Column

Type

Name

Code

Description

Enabled

Description

The type of service. Display only.

A display name for this service.

The vertical service code (VSC) for this service. Must consist of an asterisk/star (*) followed by two digits.

Registered endpoints can activate this feature by dialing the VSC followed by the alias. They can deactivate it by dialing the VSC alone.

Brief description of the service.

Clearing this check box lets you turn off the service.

See also:

Call Server Configuration on page 233

Prefix Service on page 271

Embedded DNS

In a superclustered configuration, the clusters that make up the supercluster automatically take over for each other in the event of an outage. In order to gain the full benefit of this feature, however, the endpoints that are registered to each cluster must re-register to a new cluster when the new cluster takes over.

This can be accomplished by specifying the gatekeeper or SIP proxy that each endpoint will register to as a site’s domain name, rather than an IP address. Then, when there is a failover, the DNS A record for that site’s domain name can be mapped to a different IP address, changing the Call Server that each endpoint is registered to.

The embedded DNS capability of the Polycom RealPresence DMA system automates this procedure.

Each Polycom RealPresence DMA server hosts its own embedded DNS server. It publishes a DNS CNAME record for each site. That CNAME record maps to the active cluster with which endpoints at the site should register. Whenever responsibility for the site moves from one cluster to another, the change is automatically published by the embedded DNS server. Endpoints will automatically re-register to the correct cluster.

Note: Embedded DNS Server does not support IPv6

The embedded DNS functionality is not supported in an IPv6 environment.

You can enable these embedded DNS servers on the Embedded DNS page. This is a supercluster-wide setting.

If you wish to use this feature, your enterprise DNS must place the Polycom RealPresence DMA supercluster in charge of resolving the sub-domain specified on this page. To do this, you must:

●Add NS records to your enterprise DNS so that it refers requests to resolve the site-based logical host name (see Site Information Dialog Box) to these embedded DNS servers.

●Configure your enterprise DNS to forward requests for names in the site-based logical host name to any of the clusters in the supercluster.

For more information, see Add Required DNS Records for the Polycom RealPresence DMA System.

Polycom, Inc. 274