how open sql server always on replica read_only

I think yes..
https://technet.microsoft.com/en-us/library/ff878253(v=sql.110).aspx

What do  you want to achieve? T-SQL ? <<To view the properties of an availability replica>>
https://technet.microsoft.com/en-us/library/hh212946(v=sql.110).aspx#TsqlProcedure

I have forgotten how I can access on secondary replica read only.

What are you using to access the replica?

If replica status is synchronized it isn't possible to access it.

Is returning any error?

sqlcmd -S LISTENER -Uapp_read  -K readonly

Try with -M switch:

sqlcmd -M LISTENER -U app_read  -K readonly 

Select allOpen in new window

Oh, connecting to an AG you need to provide the database, so test first like this:

sqlcmd -S LISTENER -U app_read  -d databasename -K readonly 

Select allOpen in new window

Thanks if I specify -d option :
Sqlcmd: Error: Microsoft ODBC Driver 11 for SQL Server : TCP Provider: No connec
tion could be made because the target machine actively refused it.
.
Sqlcmd: Error: Microsoft ODBC Driver 11 for SQL Server : Login timeout expired.
Sqlcmd: Error: Microsoft ODBC Driver 11 for SQL Server : A network-related or in
stance-specific error has occurred while establishing a connection to SQL Server
. Server is not found or not accessible. Check if instance name is correct and i
f SQL Server is configured to allow remote connections. For more information see
 SQL Server Books Online..

Is it maybe https://msdn.microsoft.com/en-us/library/hh213417.aspx :

Availability Group Listeners and Server Principal Names (SPNs)

Server Principal Name (SPN) must be configured in Active Directory by a domain administrator for each availability group listener name in order to enable Kerberos for the client connection to the availability group listener. When registering the SPN, you must use the service account of the server instance that hosts the availability replica . For the SPN to work across all replicas, the same service account must be used for all instances in the WSFC cluster that hosts the availability group.

Use the setspn Windows command line tool to configure the SPN. For example to configure an SPN for an availability group named AG1listener.Adventure-Works.com hosted on a set of instances of SQL Server all configured to run under the domain account corp/svclogin2:

Copy


setspn -A MSSQLSvc/AG1listener.Adventure-Works.com:1433 corp/svclogin2  

Thanks

I'm not sure if it's a SPN issue.
Can you check if your AG is healthy (all databases need to be synchronized)?
If you change the LISTENER to the respective SQL Server instance it would work?

Hello,

Thanks the TCP port wasn't correct.

Regards

Have you setup the AG for application intent use?

If you're looking for an article you could perform your own search.
The command I gave didn't work?

Have you setup the AG for application intent use ?
yes
Read routing url were not correct.