Unified CCX stores the configuration in the local
datastore on the Unified CCX server. Unified CCX accesses the user
information from Unified CM via the Unified CM Administrative XML
Layer (AXL) API. User authentication is also done via the Unified CM AXL
Unified CCX supports Microsoft Active Directory (AD) and
Netscape Directory (ND). However, since the integration is done on the
Unified CM LDAP configuration, the user information is downloaded from the LDAP
directory to the Unified CM local database, which in turn is synched down
to Unified CCX periodically via the AXL API. User authentication requests
are sent to Unified CM via the AXL API and then relayed to the external
LDAP directory service if configured.
Because user authentication requires access to a user database
in the LDAP server, if the LDAP server is down or unavailable, you cannot
access the Unified CCX Administration web interface and agents cannot log
in. Thus, install a redundant LDAP server to provide high availability.
Unified CM allows you to configure multiple LDAP servers to provide redundancy.
Unified CCX-specific users for Unified CM
Telephony and RmCm subsystems are now created under the Cisco Unified
Communications Manager Application User Group. Thus, these users are under the
control of Unified CM and can be created by Unified CCX via the AXL
API. This allows the Unified CCX auto provisioning feature to work
seamlessly without requiring manual access to the LDAP directory configuration
In scenarios where multiple Unified CCX systems are
configured on the same Unified CM cluster, each Unified CCX system
has visibility to all Resources on the Unified CM cluster. Any user who
has been assigned an ICD extension in Unified CM will be listed as a
Resource in Unified CCX Administration for each Unified CCX system.
Since a Resource can only be associated with one Unified CCX system, this
requires that the Administrator be aware of which resources are associated with
each system. The Administrator can mitigate the confusion by having a unique
naming convention for Resources associated with a particular Unified CCX
Since Unified CCX synchronizes with the Unified CM
database for user information every 10 minutes, a Unified CM cluster with
multiple Unified CCX systems will take longer to synchronize and generate
more traffic that could impact the network and server performance.
For more information about LDAP integration on
Unified CM, refer to the Cisco Unified Communications Solution
Reference Network Design (SRND).
For more information about directory access and best
practices, please refer to the directory access and integration topic in
Cisco Unified Communications Solution Reference Network Design (SRND)