DB Link issue while using it remotely

  • From: "Mandal, Ashoke" <ashoke.k.mandal@xxxxxxxxxxxxx>
  • To: oracle-l <oracle-l@xxxxxxxxxxxxx>
  • Date: Mon, 21 Oct 2013 21:49:05 +0000

When I try to use the database link of a schema remotely then I get the error 
ORA-12154: TNS: could not resolve the connect identifier specified.

If I login to the server, hosting the database, login to the schema owner using 
SQL*PLus and use the database link then it works fine as my primary method of 
database connectivity resolution is LDAP. But if I try to use the DB link from 
toad or SQL*Plus from my laptop then I get the above error.
After trial and error  I found out that if I added the databases to 
tnsnmaes.ora file on the server then the DB link works  from remote (TOAD or 
laptop). But no idea what is the root cause.

Let me know if you have experienced the similar issue and explain the root 
cause of the problem.

Thanks,
Ashoke



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