Ihave just received 2 new 2008 servers and I would like to deploy and test SEPM 12.1 on one of them and add that SEPM 12.1 server to my current SEP environment currently managed by 1 SEPM 11.6.(11.0.6005.562) as additional SEPM for failover or load balancing.
since both are different version, you cannot have different version on loadbalance/replication.
Two different infrastructure with different version can exist at same location.
70% my current SEP clients running SEP 11.6 will get upgraded to 12.1 in the future but 30% will need to stay on 11.6 as we are still running a lot of servers/desktop on Win 2000 and as far as I know 12.1 is not supporting Win 2000.
What will be the best and easiest way to achieve this task without affecting any currently installed SEP 11.6 clients?
Windows 2000 is already EOL, you need to plan to plan upgrade to the supported version of OS.
Or I will need to install another SEPM 11.6, add it to my current environment and then upgrade it to SEPM 12.1?
you can have SEP 12.1 in the environment and SEP 11 clients reporting to it.