Passing the Voice lab exam requires a depth of understanding difficult to obtain without hands-on experience. Early in your preparation you should arrange access to the equipment covered on the exam, and listed below.
Any major release of Call Manager, Unity or CRS that has been generally available for six months is eligible for testing in the CCIE Voice lab exam. You may see more recent IOS versions installed in the lab, but will not be tested on those features unless indicated below.
* All routers use IOS version 12.4 Main Train
* Catalyst 6503 series switches use Switch OS version 7.6(X)
* Catalyst 3550 series switches use IOS version 12.1EA
well cisco has provided a baseline, now depending on you needs, budget and support with technical skills.
you have not stated your exact needs, I seen labs that support 4 5 CCM group with redundancy
running 2600xm routers at least using 3500 also
running CME, unity with vmware and IPCC in a external MCS sserver
REDUNDANCY is a required for CCIE voice And real world networks.
you have to evaluate this, you can use miniumum one CM connected to your switch and one router for each group, you can use the same switch for multiple groups (vlans) and have each group you create connected via serial ports( Frame relay, MPLS ...) THIS IS WHAT i HAVE BEEN WORKING WITH
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.