Ok this is my scenario
I have 4 DC's in a mixed single forest domain. Two win 2003 servers and two win 2008 servers. let's call them...
dc3-2008 has all the FSMO roles. This server also has multiple nics (3 nics) connected to different networks. where one of them is connected to a subnet where actually a fifth dc resides (a lab network). So this DC has three ip addresses..
The problem is with the ntp server. Several times a day it looses connection with the external ntp server.
I notice this when things start to get slow like initiating an RDP session.
When I run w32tm / monitor on the prompt, it shows that all DC's get their time from the PDC server which is correct but it also shows that the PDC itself could not connect to the external ntp server. When this happen the PDC server list itself with the ip address of the nic interface to the lab network which doesn't have any internet connection so it makes sense.
When it do work, the PDC list itself with either of the other two ip addresses that does have internet access.
So the question, is it possible to bind the PDC to only use one specific ip address?
I know that having a multihomed DC is not best practice but this is how the AD looks like.