configurable subzones. Each manually configured subzone
specifies a range of IP addresses. When an endpoint registers
with the VCS it is allocated to the appropriate subzone based
on its IP address. If the endpoint’s IP address does not match
any of the subzones, it is assigned to the Default Subzone. The
Local Zone may be independent of network topology, and may be
comprised of multiple network segments.
The VCS also has two special types of subzones. The first is the

Traversal Subzone

, which is always present (see the

Traversal

Subzone

section for more information). The second is the

Cluster Subzone

, which is only present when your VCS is part of

a cluster (see the

Clustering

section for more information).

Overview

Bandwidth Management

The Local Zone’s subzones exist for the purposes of bandwidth
management. Once you have set up your subzones you can
apply bandwidth limits to:

individual calls between two endpoints within the subzone

•

individual calls between an endpoint within the subzone and

•

another endpoint outside of the subzone
the total of calls to or from endpoints within the subzone.

•

For full details of how to create and configure subzones, and
apply bandwidth limitations to subzones including the Default
Subzone and Traversal Subzone, see the section on

Bandwidth

Control

Configuring the Local Zone and its Subzones

Local Zone Matches

One of the functions of the VCS is to route a call received from
a locally registered endpoint or external zone to its appropriate
destination. Calls are routed based on the address or alias of
the destination endpoint.
When searching for a destination endpoint, the VCS will search
its Local Zone and external zones. You can prioritize the order in
which these zones are searched, and filter the search requests
sent to each zone, based on the address or alias being searched
for. This allows you to reduce the potential number of search
requests sent to the Local Zone and out to external zones, and
speed up the search process.
For further information on how to configure the Local Zone
Matches and the overall process for searching zones, see the

Zone Searching and Transforming

section.

The ability to include the Local Zone when prioritizing
zone searches is a new feature in VCS version X3.0.
Prior to this version, the Local Zone was always

searched before any external zones.