"Resolve Issues: Cisco Unified CM Cluster for Call Control Discover"

AF.

The Cisco Unified CM cluster is being set up for call control discover using the service advertising framework, but patterns are not being learned by the cluster. To resolve the issue, the following two items must be checked:

A. The CCD block patterns are not preventing remote patterns from being entered into the local cache.

• CCD block patterns are used to block certain patterns from being learned or advertised by the Cisco Unified CM cluster. If the CCD block patterns are configured incorrectly, they can prevent the remote patterns from being entered into the local cache. Therefore, it is important to verify that CCD block patterns are not preventing remote patterns from being entered into the local cache.

B. The hostedDN group on the cluster matches the patterns that should be learned.

• HostedDN group is a group of devices that share the same directory number (DN) patterns. If the hostedDN group on the cluster does not match the patterns that should be learned, then the patterns will not be learned. Therefore, it is important to verify that the hostedDN group on the cluster matches the patterns that should be learned.

C. The CCD advertising service is activated in Cisco Unified CM serviceability.

• CCD advertising service is responsible for advertising patterns learned by the cluster to other clusters or devices. If the CCD advertising service is not activated, the patterns learned by the cluster will not be advertised. Therefore, it is important to verify that the CCD advertising service is activated in Cisco Unified CM serviceability.

D. A CCD route partition has been assigned for learned patterns.

• A CCD route partition is used to control the scope of the learned patterns. If a CCD route partition has not been assigned for learned patterns, the patterns may not be properly distributed. Therefore, it is important to verify that a CCD route partition has been assigned for learned patterns.

E. The CCD requesting service is activated in Cisco Unified CM serviceability.

• CCD requesting service is responsible for requesting patterns from other clusters or devices. If the CCD requesting service is not activated, the cluster will not be able to request patterns from other clusters or devices. Therefore, it is important to verify that the CCD requesting service is activated in Cisco Unified CM serviceability.

F. The SIP trunk is enabled for call control discover.

• If the SIP trunk is not enabled for call control discover, the cluster will not be able to discover other clusters or devices. Therefore, it is important to verify that the SIP trunk is enabled for call control discover.

In summary, to resolve the issue of patterns not being learned by the Cisco Unified CM cluster, the engineer should check if CCD block patterns are preventing remote patterns from being entered into the local cache and if the hostedDN group on the cluster matches the patterns that should be learned. Additionally, the engineer should verify that the CCD advertising service, CCD requesting service, and SIP trunk are enabled and that a CCD route partition has been assigned for learned patterns.