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CONTAP-79128: The default site is always used for trusted domain controller discovery in the CIFS discovery mode "site"

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NAS
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Issue

  • In a trusted domain configuration, with the CIFS default site configured, DNS queries for trusted domains includes the site name from the home domain
Examples:

     cluster::> cifs domain trusts show -node node-01 -vserver SVM01
     
                    Node: node-01
                 Vserver: SVM01
        Home Domain Name: DEMO.DOMAINA.LOCAL
     Trusted Domain Name: NAS.LOCAL, DEMO.DOMAINA.LOCAL

     cluster::> cifs show -vserver SVM01
     
                                          Vserver: SVM01
                         CIFS Server NetBIOS Name: SVM01
                    NetBIOS Domain/Workgroup Name: DEMO
                      Fully Qualified Domain Name: DEMO.DOMAINA.LOCAL
                              Organizational Unit: CN=Computers
     Default Site Used by LIFs Without Site Membership: test <<< !
     [...]

     cluster::> event log show -event *dns*
     Time                Node             Severity      Event
     ------------------- ---------------- ------------- ---------------------------
     10/24/2022 13:41:22 node-01     ERROR         secd.dns.srv.lookup.failed: DNS server failed to look up service (_kerberos._tcp.test._sites.NAS.LOCAL) for vserver (SVM01) with error (No server(s) found).


Note: The above EMS message contains default site "test" incorrectly.

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