ORACLE 11G RAC 訪問SCANIP ORA-12545

In this Document
  Symptoms
  Cause
  Solution
  References

Symptoms

Error ORA-12545 or ORA-12537 reported while trying to connect to 11gR2 Real Application Cluster (RAC) database through SCAN name

Cause

Client is able to resolve all Fully Qualified Domain Name (FQDN) SCAN and VIP name but not short ones(without domain name) as its in different domain; even though FQDN names were specified during Grid Infrastructure setup, due to bug 9150053 by default DBCA set database parameter local_listener to short node VIP name while database is created.

In following example, eotcs.us.oracle.com is SCAN name and eyrac1fv.us.oracle.com is one of the node VIP name, on client machine:

Solution

bug 9150053 will be fixed in 11.2.0.2 and above, though easy workaround is available:

1. Database level setting:

Modify pfile/spfile parameter local_listener to use FQDN VIP name or VIP.

SQL> alter system set local_listener='(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=eyrac1fv.us.oracle.com)(PORT=1521))))' sid='b2no1';

Or 

SQL> alter system set local_listener='(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=120.0.0.211)(PORT=1521))))' sid='b2no1';

And register with listener:

SQL> alter system register;

2. Per client setting:

Specify FQDN SCAN name in client tnsnames.ora and add all node VIP name/IP pairs to hosts file:

Or set search domain: in /etc/resolv.conf on Linux/Unix or "Append DNS suffixes" on Windows 

  Linux/Unix:

  Windows: