We just had an issue with a domain controller that holds the following roles :
PDC, RID Pool Manager
Our domain level is Windows 2000 Native
We have got 2 Sites
2 x Win 2003 R2 Domain Controllers
1 x Win 2008 R2 Domain Controller
2 x Win 2008 R2 Domain Controllers
When the server in question locked up (2003 R2 DC) it brought the entire network down.
So my question is why, and how can I prevent this.
Also should I raise my domain level?