$ORACLE_HOME/network/log has network error

Issue

• $ORACLE_HOME/network/log has network error

  Fatal NI connect error 12170.
  
  VERSION INFORMATION:
  TNS for Linux: Version 11.1.0.7.0 - Production
  Oracle Bequeath NT Protocol Adapter for Linux: Version 11.1.0.7.0 - Production
  TCP/IP NT Protocol Adapter for Linux: Version 11.1.0.7.0 - Production
  Time: 11-DEC-2010 10:40:52
  Tracing not turned on.
  Tns error struct:
  ns main err code: 12535
  
  TNS-12535: TNS:operation timed out
  ns secondary err code: 12560
  nt main err code: 505
  
  TNS-00505: Operation timed out
  nt secondary err code: 110
  nt OS err code: 0
  Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.173.208.34)(PORT=2276))
  Sat Dec 11 10:41:12 2010