i'm not able to start my Porduction DB

hi,

my Production DB (11.2.0.3) is down , and ora 600 appear in the log file once i tried to start it ,with

ORA-00600: internal error code, arguments: [16305], [], [], [], [], [], [], [],

[], [], [], []

PMON (ospid: 34761): terminating the instance due to error 472

Instance terminated by PMON, pid = 34761

after the search , this first parameter talk about  the following (while it is not setup in my DB)

If tcp.validnode_checking is yes and tcp.invited_nodes includes

an unresolvable host, PMON and dispatchers will not start presenting

the following errors:

  ORA-600[16305]

Workaround:

  Correct invited_nodes parameter not to have unresolvable hosts.

can someone help ASAP