Time-out error and you cannot connect to a SQL Server 2012 AlwaysOn availability group listener in a multi-subnet environment
Once you are done with AG Creation and Listener configuration , change the RegisterAllProvidersIP value from 1 to 0.
PS C:Users> Get-ClusterResource AG_ListenerName| Get-ClusterParameter RegisterAllProvidersIP
Change to
PS C:Users> Get-ClusterResource AG_ListenerName | Set-ClusterParameter RegisterAllProvidersIP 0