Hola, corrí los comandos en el DC Secundario y me muestra lo siguiente:  
C:\>dcdiag /test:dns 
Directory Server Diagnosis 
Performing initial setup: 
   Trying to find home server... 
   Home Server = afrodita 
   * Identified AD Forest. 
   Done gathering initial info. 
  
Doing initial required tests 
  
   Testing server: Nombre-predeterminado-primer-sitio\AFRODITA 
      Starting test: Connectivity 
         ......................... AFRODITA passed test Connectivity 
 Doing primary tests 
   Testing server: Nombre-predeterminado-primer-sitio\AFRODITA 
      Starting test: DNS 
         DNS Tests are running and not hung. Please wait a few minutes... 
         ......................... AFRODITA passed test DNS 
   Running partition tests on : ForestDnsZones 
   Running partition tests on : DomainDnsZones 
   Running partition tests on : Schema 
   Running partition tests on : Configuration 
   Running partition tests on : dominio 
   Running enterprise tests on : dominio.corp 
      Starting test: DNS 
         Test results for domain controllers: 
             DC: afrodita.dominio.corp 
            Domain: dominio.corp 
          Summary of DNS test results: 
                                           Auth Basc Forw Del  Dyn  RReg Ext 
            _________________________________________________________________ 
            Domain: dominio.corp 
               afrodita                     PASS PASS PASS FAIL PASS PASS n/a 
         ......................... dominio.corp failed test DNS 
 ------------------------------------------------------------------------------------------------------------------------------------------------------------ 
Y al correr el comando dcdiag muestra lo siguiente: También en el secundario. 
 C:\>dcdiag 
Directory Server Diagnosis 
Performing initial setup: 
   Trying to find home server... 
   Home Server = afrodita 
   * Identified AD Forest. 
   Done gathering initial info. 
  
Doing initial required tests 
   Testing server: Nombre-predeterminado-primer-sitio\AFRODITA 
      Starting test: Connectivity 
         ......................... AFRODITA passed test Connectivity 
Doing primary tests 
   Testing server: Nombre-predeterminado-primer-sitio\AFRODITA 
      Starting test: Advertising 
         ......................... AFRODITA passed test Advertising 
      Starting test: FrsEvent 
         ......................... AFRODITA passed test FrsEvent 
      Starting test: DFSREvent 
         ......................... AFRODITA passed test DFSREvent 
      Starting test: SysVolCheck 
         ......................... AFRODITA passed test SysVolCheck 
      Starting test: KccEvent 
         ......................... AFRODITA passed test KccEvent 
      Starting test: KnowsOfRoleHolders 
         ......................... AFRODITA passed test KnowsOfRoleHolders 
      Starting test: MachineAccount 
         ......................... AFRODITA passed test MachineAccount 
      Starting test: NCSecDesc 
         ......................... AFRODITA passed test NCSecDesc 
      Starting test: NetLogons 
         ......................... AFRODITA passed test NetLogons 
      Starting test: ObjectsReplicated 
         ......................... AFRODITA passed test ObjectsReplicated 
      Starting test: Replications 
         ......................... AFRODITA passed test Replications 
      Starting test: RidManager 
         ......................... AFRODITA passed test RidManager 
      Starting test: Services 
         ......................... AFRODITA passed test Services 
      Starting test: SystemLog 
         An error event occurred.  EventID: 0x00000422 
            Time Generated: 11/26/2015   19:14:48 
            Event String: 
            The processing of Group Policy failed. Windows attempted to read the 
 file \\dominio.corp\SysVol\dominio.corp\Policies\{DB8FAF6B-92D7-490E-922E-XXXXXXXXXXXX}\gpt.ini from a domain controller and was not successful. Group Policy setting 
s may not be applied until this event is resolved. This issue may be transient a 
nd could be caused by one or more of the following: 
         An error event occurred.  EventID: 0x00000422 
            Time Generated: 11/26/2015   19:19:49 
            Event String: 
            The processing of Group Policy failed. Windows attempted to read the 
 file \\dominio.corp\SysVol\dominio.corp\Policies\{DB8FAF6B-92D7-490E-922E-XXXXXXXXXXXX}\gpt.ini from a domain controller and was not successful. Group Policy setting 
s may not be applied until this event is resolved. This issue may be transient a 
nd could be caused by one or more of the following: 
         An error event occurred.  EventID: 0x00000422 
            Time Generated: 11/26/2015   19:24:50 
            Event String: 
            The processing of Group Policy failed. Windows attempted to read the 
 file \\dominio.corp\SysVol\dominio.corp\Policies\{DB8FAF6B-92D7-490E-922E-XXXXXXXXXXXX}\gpt.ini from a domain controller and was not successful. Group Policy setting 
s may not be applied until this event is resolved. This issue may be transient a 
nd could be caused by one or more of the following: 
         An error event occurred.  EventID: 0x00000422 
            Time Generated: 11/26/2015   19:29:51 
            Event String: 
            The processing of Group Policy failed. Windows attempted to read the 
 file \\dominio.corp\SysVol\dominio.corp\Policies\{DB8FAF6B-92D7-490E-922E-XXXXXXXXXXXX}\gpt.ini from a domain controller and was not successful. Group Policy setting 
s may not be applied until this event is resolved. This issue may be transient a 
nd could be caused by one or more of the following: 
         An error event occurred.  EventID: 0x0000272C 
            Time Generated: 11/26/2015   20:03:37 
                        Event String: 
            The processing of Group Policy failed. Windows attempted to read the 
 file \\dominio.corp\SysVol\dominio.corp\Policies\{DB8FAF6B-92D7-490E-922E-XXXXXXXXXXXX}\gpt.ini from a domain controller and was not successful. Group Policy setting 
s may not be applied until this event is resolved. This issue may be transient a 
nd could be caused by one or more of the following: 
         ......................... AFRODITA failed test SystemLog 
      Starting test: VerifyReferences 
         ......................... AFRODITA passed test VerifyReferences 
  
  
   Running partition tests on : ForestDnsZones 
      Starting test: CheckSDRefDom 
         ......................... ForestDnsZones passed test CheckSDRefDom 
      Starting test: CrossRefValidation 
         ......................... ForestDnsZones passed test 
         CrossRefValidation 
  
   Running partition tests on : DomainDnsZones 
      Starting test: CheckSDRefDom 
         ......................... DomainDnsZones passed test CheckSDRefDom 
      Starting test: CrossRefValidation 
         ......................... DomainDnsZones passed test 
         CrossRefValidation 
  
   Running partition tests on : Schema 
      Starting test: CheckSDRefDom 
         ......................... Schema passed test CheckSDRefDom 
      Starting test: CrossRefValidation 
         ......................... Schema passed test CrossRefValidation 
  
   Running partition tests on : Configuration 
      Starting test: CheckSDRefDom 
         ......................... Configuration passed test CheckSDRefDom 
      Starting test: CrossRefValidation 
         ......................... Configuration passed test CrossRefValidation 
  
   Running partition tests on : dominio 
      Starting test: CheckSDRefDom 
         ......................... dominio passed test CheckSDRefDom 
      Starting test: CrossRefValidation 
         ......................... dominio passed test CrossRefValidation 
  
   Running enterprise tests on : dominio.corp 
      Starting test: LocatorCheck 
         ......................... dominio.corp passed test LocatorCheck 
      Starting test: Intersite 
         ......................... dominio.corp passed test Intersite 
 _________________________________________________________________________________________ 
Gracias por la ayuda. 
Saludos.