The official SQL Server AlwaysOn team blog.
One of the most frequent questions I get asked from customers is which high availability capabilities are available in which editions of SQL Server 2012.
Here are details of SQL Server 2012 Editions and the capabilities: http://www.microsoft.com/sqlserver/en/us/future-editions/sql2012-editions.aspx.
For more information on SQL Server licensing, read: http://www.microsoft.com/sqlserver/en/us/future-editions/sql2012-licensing.aspx
Thank you for the clarification as I was curious about that too when I migrate come release time.
I didn't find any info about licensing the secondary replicas. Do we need licensing all the replicas?
We have 4 servers 24 cores each one.(1 Primary and 3 secondary replicas)
Thanks in advance!!!
See pages 11 and 12 of the Licensing Guide - download.microsoft.com/.../SQL_Server_2012_Licensing_Guide_Apr2012.pdf
If your secondary servers are passive - additional licensing is not always required. For example: if you have a primary server that is properly licensed with lets say 24 cores, you can install a second instance of SQL on a second server (as long as it has no more than 24 cores) - this is called passive fail over rights.
The key points about passive fail over rights are: The secondary server has to be PASSIVE. For each properly licensed server you are given rights to one secondary server (e.g. in a scenario where you have 1 primary active, and 3 secondary passive servers, the primary and 2 of the secondaries would need to be licensed).
I hope this answers your question.
BTW: This SQL 2012 Guide is horrible. You cannot ready they dark gray text on the black background.