Cisco Cisco Expressway Maintenance Manual
Zones and Neighbors
This section describes how to configure zones and neighbors on the Expressway (Configuration > Zones).
About Zones
A zone is a collection of endpoints, either all registered to a single system or located in a certain way such as via an
ENUM or DNS lookup. Zones are used to:
ENUM or DNS lookup. Zones are used to:
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control through links whether calls can be made between these zones
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manage the bandwidth of calls
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search for aliases
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capabilities for SIP calls to and from a zone
You can configure up to 1000 zones. Each zone is configured as one of the following zone types:
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: a connection to a neighbor system of the local Expressway.
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: the local Expressway is a traversal client of the system being connected to, and there is a
firewall between the two.
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: the local Expressway is a traversal server for the system being connected to, and there is a
firewall between the two.
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: the zone contains endpoints discoverable by ENUM lookup.
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: the zone contains endpoints discoverable by DNS lookup.
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: a traversal client or traversal server zone used for Unified Communications
features such as mobile and remote access or Jabber Guest. Note that this zone type applies to the web
interface only; the underlying CLI configuration uses traversal client and traversal server zone types.
interface only; the underlying CLI configuration uses traversal client and traversal server zone types.
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section for information about the configuration options available for all zone types.
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section for information about including zones as targets
for search rules.
Automatically generated neighbor zones
The Expressway may automatically generate some non-configurable neighbor zones:
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