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Hidden Enterprise Parameters on CUCM to be considered while migrating CUCMBE5k to CUCM/CUC
Some information on BE5000 and BE6000 :
•Business Edition 5000 runs on a single hardware platform (MCS 7828), and it provides a single instance of Unified CM (a combined publisher and single subscriber instance). A secondary subscriber instance is not configurable.
•Business Edition 6000 runs on a UCS C200 Rack-Mount Server and provides a single instance of Unified CM (a combined publisher and single subscriber instance). An additional UCS C200 server may be deployed to provide subscriber redundancy either in an active/standby or load balancing fashion for Cisco Business Edition call processing as well as other co-resident applications. Cisco recommends deploying redundant servers with load balancing so that the load is distributed between the two UCS C200 servers. Alternatively an MCS server can be used to provide Unified CM subscriber redundancy either in active/standby or load balancing fashion.
For the migration from CUCM BE 5k to CUCM BE 6K below is the reference docuemnt : https://supportforums.cisco.com/docs/DOC-34720
As per the document, the CUCM config is exported using BAT from CUCM BE 5K, the same is imported on CUCM BE 6K
There are a hidden Enterprise Parameters on CUCM Eg : 'MaxServers' which limits the number of server in a cluster, 'MaxPhones' which limit the number of supported phones etc. Theres parameters cannot be seen under CUCM Administration page Server > Enterprise Parameters Configuration Page. You can find these values when you export the Enterprise parameters using BAT(Attacheced a reference copy from CUCM 9.1.1)
On CUCMBE5K, the 'MaxServers' value is set to ‘1’, and this is part of the ‘enterpriseparameter’ file in the Export TAR file.
If this Export file is used to do BAT Import on CUCMBE6k or normal CUCM. After the BAT Import, you will not be able to add servers to the Cluster, you will see the below error when you try adding a new node to cluster : “Add failed. Max number of servers in cluster has been exceeded for install type"
Run the follwoing query to update this parameter : run sql UPDATE ProcessConfig SET paramvalue ='30' WHERE paramname ='MaxServers'
After running the SQL query, you can add more servers to the cluster.
Similary to increase the Maxphones allowed run the following : run sql UPDATE ProcessConfig SET paramvalue ='1000' WHERE paramname ='MaxPhones'