If start my database up, it is mounted and opened but goes down soon afterwards with: ORA-12571: TNSacket writer failure

I did the suggested fix found on metalink and started the database but it shutdown again with:


*** SESSION ID:(5.1) 2002-12-10 12:26:55.379

*** 2002-12-10 12:26:55.378

ksedmp: internal or fatal error

ORA-00600: internal error code, arguments: [kcbrbr_2], [3], [42022578], [128], [], [], [], []

Does anyone know if this is a bug or not? I am on 8.1.6

Thanks