- CCM can only (1) Publisher per cluster with up to 7 subscribers.
Typically, the following scenario applies with respect to configuring device pools. The deployment model drives the exact model of clustering and device pools that are used:
?Redundancy for single-site cluster, multisite WAN centralized call processing, and multisite WAN distributed call processing?Device pool configuration uses Cisco CallManager groups as redundancy basis. For example, a cluster can have up to eight Cisco CallManager servers: A, B, C, D, E, F, G, and H; four configured as active and four configured as backup. Using 1:1 redundancy, the groups would comprise servers AB, CD, EF, and GH. Using 1:1 redundancy with load balancing, the groups would comprise AB, BA, CD, DC, EF, FE, GH, and HG.
Note A Cisco CallManager cluster with more than 20,000 IP phones requires 1:1 redundancy. You may also configure 2:1 redundancy for smaller clusters; for example, AC, BC, DF, and EF, where ABDE comprise primary servers, and CF comprise the backup servers.
How many sites will you have phones at? Software conferencing for that many phones is probably not a good idea. I would look into a CMM or 6608 port for that. We had issues with our larger remote sites and software Conferencing. How are you connecting to the PSTN?
We will have phones at about 75 sites. These sites are connected back to the data center where callmanager resides via fiber. We have some hardware conference bridges that do reside on a CMM blade. We also have 2 cmm blades that we use to go out the PSTN.
I will have about 8000 phones and we have purchased 5 MCS-7845. Trying to find the best way to set up the cluster using these servers. Any suggestions comments welcome. Thanks for the reply
Jason, I think that that Call Manager Group looks good. I don't think you will need to do a 1:1 ratio. That is good news that you have the hardware conference resource. We currently have 6000 phones, but we have them on 3 different clusters. I run about 1500 phones per subscriber. Each one of our clusters have a Pub and 2 Subs. I set them up the same
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.