I have EV 10 standalone and i will build new EV 11 clustered so what is the steps to do this migration in case of we have to migrate from standalone EV 10 to EV 11 cluster.
I would upgrade the stand-alone to 11.0.1 first. If you then also have the clustered 11.0.1 configured, you can use the Server Migration Wizard to migrate the standalone to the cluster version.
See SMW for the wizard.
Make sure you have good backups! I would also advise to discuss with support, if you can, to see if that is supported.
I have not worked with clustered EV, but here is my thought.
Prepare the EV 11 cluster as described in the manuals. When using the SMW, it is dictated that you do not configure the target environment, just install the binaries. Obviously, the setup (shared storage, MSMQ etc will need to be in place. When that is all done, you run SMW on the source. Then run SMW on the target.
That should do the trick.