To Upgrade SCCM 2012 secondary site to a Service Pack 1

  Ensure you complete these go through with this ms link

https://technet.microsoft.com/en-us/library/jj822981.aspx

1. Log on to the Secondary site and start the
   SQL Server Configuration Manager

1. Select SQL Server Network Configuration, Protocols for CONFIGMGRSEC.

2. Right click TCP/IP and click Properties.

3. Select the IP Addresses tab and scroll down
   to IPALL. Delete the entry
   in TCP Dynamic Ports and
   click OK. When prompted
   with a warning, click Yes.

4. Select SQL Server Services, right-click SQL Server, and click Restart.

5. Log on to the primary site server and
   start the ConfigMgr administrator
   console.

6. Navigate to the Administration workspace, and
   select Site Configuration and
   Sites.

7. Select the secondary site server and click Upgrade on the ribbon

8. Click Yes on the site upgrade warning.

9. Click Show Install status on the ribbon. Click the Refresh button a few times to
   receive real-time information about the upgrade process.