Licensing in the Communication Manager Distributed Architecture

Last Updated : Apr 09, 2019 |

License activation

The new Communication Manager OVA parameters provide for the CM operation in the array mode. The following cluster modes are available:
  • Master CM

  • Node CM

  • Standalone

The Communication Manager shall retrieve this parameter from the /etc/ecs.conf file.
Note:

If this field is missing in the /etc/ecs.conf file, the CM assumes that the array mode is standalone. 

The Master CM server consumes the license allocated for it on the WebLM server. Then, it expands the configured features and capacities to the Node CM servers by synching the local copy of the license file (lsfile) in /etc/opt/ecs directory. If the user updates the license on the Master CM, that update applies to the Node CMs, respectively. A Node CM server does not get a license from the WebLM server because it has no connection to the WebLM server. Instead, the Node CM server enables features and update license limits based on the lsfile it receives from the Master CM.

After it consumes the license from the WebLM server, the Master CM reports back to the WebLM server the capacities it takes, that is the full capacities assigned to the array, except for the AAMS channels, H.323 registrations, and Logged-in Agents.

AAMS Channel license usage

The Master CM server consumes the licensed AAMS channels and passes the capacities with the license file to the Node CMs.

The CMs in the array share their AAMS channel usage with the other CMs in the array. When granting channels to a new call, the total number of channels used by all CMs in the array is applicable. A CM denies channels if their total number exceeds the licensed maximum.

H.323 Registrations

The Master CM server consumes the licensed H.323 registrations and passes the capacities with the license file to the Node CMs. The following are the limits to the registrations the CMs in the array receive:
  • Maximum Concurrently Registered IP Stations: 18,000

  • Maximum Concurrently Registered IP eCons: 414

  • Maximum Concurrently Registered Unauthenticated H.323 Stations: 100