understanding ELM with CUCM cluster 10.5.2

[nuinoahmed]

Hello all,

I have 2 CUCM server (Published + Subscriber) on 2 different BE6K.  With each installed CUCM there is an ELM (Not Standalone).   ELM server with CUCM published is active and I can load licenses and all is fine.  For the ELM server with subscriber it is stating to be in demo mode. 

I read some where that we can have only one ELM server per cluster.  Is this correcte?  Is there a ELM cluster possibility?

What happern to the licenses if the first server is done and ELM + CUCM PUB are down?  

Any document /URL that explain all this I take it.  

Thanks in advance.

[Rob Huffman · Accepted solution]

Hi there,

With CUCM 10.5 ELM has actually changed to PLM (Prime License Manager). PLM cannot operate as a cluster. The info is attached below from the Collab SRND Guide;

Redundancy

Prime LM is deployed as a non-redundant application. In the event that the Prime LM application becomes unavailable (for example, if the Prime LM virtual machine is experiencing operating system issues and it cannot boot up), the customer has 60 days to restore the Prime LM application before license enforcement occurs. The applications will run for a period of 60 days without communication with the Prime LM.

For restoration of the Prime LM application, another installed Prime LM application (such as a co-resident instance) can be created by re-adding the product inventory to the new Prime LM application. Since the MAC address of the virtual machine running the new PLM application would be different, transferring the registration of the license file to this new Prime LM would be required. Alternatively, Prime LM can be restored from a Disaster Recovery System (DRS) backup. In this case, configure the same MAC address on the new and original Prime LM virtual machines, otherwise the license registration will have to be transferred to the new virtual machine. If license additions or changes have been made since the DRS backup, a new license file will have to be requested. A Prime LM co-resident backup can be restored only to a co-resident Prime LM application, and a standalone backup can be restored only to a standalone Prime LM.

From;

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/callpros.html#pgfId-1347951

Cheers!

Rob