Database connection YSD: SQL error 12154 con=1(srv-sapdev-1:1521/YSD.world): ORA-12154: TNS:could not resolve the connect identifier specified

    Hi All,

we configuration managed system in SLM7.1 in parameter stage，

DB parameter:

setup DBACockpit/DB extractor: X

Database Host:srv-sapdev-1

Service name:YSD

Port Number:1521

TNS Name:YSD

User Name:SAPSR3

Password:XXXXXX

error pop up:"

Name	Value
Message	The connection 'YSD' is not set up correctly.
Message	Database connection YSD: SQL error 12154 con=1(srv-sapdev-1:1521/YSD.world): ORA-12154: TNS:could not resolve the connect identifier specified

"

    So we do the tnsping at managed system host, and it is ok.

    Then we do the tnsping at solution manager host, it report error:"TNS-12535: TNS:operation timed out"

    the content of tnsnames.ora on SLM host:

SM5.WORLD=
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = SAP.WORLD)
          (PROTOCOL = TCP)
          (HOST = BSSLM5)
          (PORT = 1527)
        )
    )
    (CONNECT_DATA =
      (SID = SM5)
      (GLOBAL_NAME = SM5.WORLD)
    )
  )

YSD.WORLD=
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = YSD.WORLD)
          (PROTOCOL = TCP)
          (HOST =srv-sapdev-1)
          (PORT = 1521)
        )
    )
    (CONNECT_DATA =
      (SID = YSD)
      (GLOBAL_NAME = YSD.WORLD)
    )
  )

Kindly help

June