CMDB version 2.1 and earlier are end of life and are no longer available for download.
The newer versions of the CMDB have a very long range of significant improvements, and I strongly suggest you use the latest release, currently CMDB 7.6.04 SP2.
Thanks for your response .
I have tried to install the BMC Atrium cmdb 7.6.04 on AR server 7.1 but I am not able. It requires ar server 7.5
so how can i have CMDB installed on version 7.1?
I am afraid you have to upgrade your AR Server to a later version before you can install the CMDB. Is there something that prevents you from doing this?
Exactly... I am building 3 tests environments (7.1,7.5 and 7.6) so i need also one environment with 7.1
any solution for this situation?
7.5 and 7.6 are the only supported versions (and you will want 7.6 for the longest term support), so there is no way for you to get hold of and provision the old, unsupported version.