About Zones; Default Zone - Cisco TelePresence Administrator's Manual

About zones

A zone is a collection of endpoints, either all registered to a single system (for example a VCS, Gatekeeper,
or Border Controller), or located in a certain way such as via an ENUM or DNS lookup. Zones are used to:
control through links whether calls can be made between your local subzones and these other zones
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manage the bandwidth of calls between your local subzones and endpoints in other zones
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search for aliases that are not registered locally
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control the services available to endpoints within that zone through the VCS's
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You can configure up to 1000 zones. Each zone is configured as one of the following zone types:
Neighbor: a connection to a neighbor system of the local VCS.
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Traversal client: the local VCS is a traversal client of the system being connected to, and there is a firewall
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between the two.
Traversal server: the local VCS is a traversal server for the system being connected to, and there is a
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firewall between the two.
ENUM: the zone contains endpoints discoverable by ENUM lookup.
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DNS: the zone contains endpoints discoverable by DNS lookup.
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The VCS also has a pre-configured Default Zone.
See the Zone configuration
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types.
See the Configuring search and zone transform rules
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targets for search rules.

Default Zone

Any incoming calls from endpoints or other devices that are unregistered or not recognized as belonging to
the Local Zone or any of the existing configured zones are deemed to be coming from the Default Zone.
The VCS comes pre-configured with the Default Zone and
Subzone and the Traversal Subzone. The purpose of the Default Zone is to manage incoming calls from
unrecognized endpoints to the VCS. You can do this by:
deleting the default links; this prevents any incoming calls from unrecognized endpoints
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applying pipes to the default links; this lets you control the bandwidth consumed by incoming calls from
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unrecognized endpoints
configuring the Default Zone's Authentication Policy
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Note that the Default Zone cannot be deleted and its only configurable option is its Authentication Policy
setting.
Cisco VCS Administrator Guide (X7.1)
section for information about the configuration options available for all zone
Authentication Policy
section for information about including zones as
default links between it and both the Default
Zones and neighbors
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