Cisco TelePresence Administrator's Manual page 147

Zones and neighbors
provide firewall traversal services to the traversal client
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query the traversal client about its endpoints
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apply transforms to any queries before they are sent to the traversal client
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control the bandwidth used for calls between your local VCS and the traversal client
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Note: traversal client-server zone relationships must be two-way. For firewall traversal to work, the traversal
server and the traversal client must each be configured with the other's details (see
client and server [p.57] for more information). The client and server will then be able to communicate over the
firewall and query each other. For full details on how traversal client zones and traversal server zones work
together to achieve firewall traversal, see
An NTP server must be configured for traversal zones to work.
The configurable options for a traversal server zone are:
Field Description
Configuration section:
Name The name acts as a unique identifier, allowing you
to distinguish between zones of the same type.
Type The nature of the specified zone, in relation to the
local VCS. Select Traversal server.
Hop count The hop count is the number of times a request will
be forwarded to a neighbor gatekeeper or proxy
(see the
This field specifies the hop count to use when
sending a search request to this particular zone.
Connection credentials section:
Username Traversal clients must always authenticate with
traversal servers by providing their authentication
credentials.
The authentication username is the name that the
traversal client must provide to the VCS
Expressway. (It is configured as the connection
credentials Username in its traversal client zone.)
H.323 section:
Mode Determines whether H.323 calls are allowed to and
from the traversal client.
Protocol Determines the protocol (Assent or H.460.18) to use
to traverse the firewall/NAT.
Port The port on the local VCS Expressway to use for
H.323 calls to and from the traversal client.
Cisco VCS Administrator Guide (X8.1.1)
About firewall traversal
Hop counts section for more information).
Configuring a traversal
[p.53].
Usage tips
After a zone has been created, the
Type cannot be changed.
If the search request was received from
another zone and already has a hop
count assigned, the lower of the two
values is used.
There must also be an entry in the VCS
Expressway's local authentication
database for the client's authentication
username and password. To check the
list of entries and add it if necessary,
go to the Local authentication
database page. Either:
click on the Add/Edit local
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authentication database
go to Configuration >
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Authentication > Local database
See Configuring ports for firewall
traversal [p.58] for more information.
Configuring zones
link
Page 147 of 507