[cisco-voip] CER Clustering on a single UCM Cluster

[Pawlowski, Adam]

Afternoon,

     I've been looking at setting up a CER cluster of two CER server groups, to support the documented capacity of number of ERLs. I'm not having a performance problem with what I have now, but, as those are the requirements, and I have over 29k ERLs, that would seem to be what I need to do here. I've managed to figure out how to get the two groups clustered together, but, I want to make sure this is a supported configuration. All the doc implies that would do this between UCM clusters, and that's how it seems to want to behave. On the "Unlocated Phones" screen, any phones that are not tracked by either group (new installs, say, and the ports are not discovered/doc'd) , show up twice. Once they're located by an ER group (but do not have an ERL defined) they disappear off of this screen. So, there's really no way to use it for things that don't have an ERL, they just are using default on some switch. 
     Is this breaking something, other than making the unlocated phones screen useless? Assuming I can account for phones using the default ERL somehow otherwise, does this set up work? Is this how I should be running this?

Thanks for your tips

Regards,

Adam P
SUNYAB