I have a small forest with a root doamin and a child domain with two DCs in each domain.
The first DC (PDSvr1) has the roles PDC, RID, Infrastructure, DNS, WINS, DHCP.
The second DC (PDSvr2) has the roles Catalog, DNS, WINS.
When the network status is OK there is no problem to login to the domain for users as well as directly on the server console.
However when there is a network problem between the two DCs users can not login even thoug they have network connection to either DC.
The most weird thing is that is not possible to login at the PDSvr1 console either. I would expext that the PDSvr1 locally has all information it needs to verify/authenticate the admin user login.
When the network connection between the two DCs is OK again, the logins also work OK again.
The same problem applies for the servers and users in the child domain.
Can anyone explain this phenomena?