AD Replication issues

I have got a client who is having 2 different Active Directory replication problem in same domain. I think that these are 2 different problems. I just wanted to report these in same message since I am not sure if these issues have something to do with each other. Domain functional level is Windows 2003 and all DCs are having operating system Windows Server 2003 SP2 standard. Check the below Ad Replication Monitor - search domain controllers for replication failures:

Active Directory Replication Domain Controller Replication Failure Output
Printed at 1.6.2009 22:13:40

Below are the replication failures detected on Domain Controllers for this domain:

Domain Controller Name: DC01
Directory Partition: DC=domain,DC=net
Replication Partner: SITE2\DC02
Failure Code: 1818
Failure Reason: The remote procedure call was
cancelled.

Domain Controller Name: DC03
Directory Partition: DC=domain,DC=net
Replication Partner: SITE4\DC04
Failure Code: 1818
Failure Reason: The remote procedure call was
cancelled.

PROBLEM 1: DC01-DC02


Event Type: Warning
Event Source: NTDS Replication
Event Category: DS RPC Client
Event ID: 1232
Date: 1.6.2009
Time: 21:40:52
User: NT AUTHORITY\ANONYMOUS LOGON
Computer: DC01
Description:
Active Directory attempted to perform a remote procedure call (RPC) to the following server. The call timed out and was cancelled.

Server:
ee15dc9e-173b-4a0d-b5c4-a823b5f6063a._msdcs.domain.net
Call Timeout (Mins):
45
Thread ID:
a78

Additional Data
Internal ID:
5001047

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Can you try to post ipconfig /all from the issue DC and also from another in the site. Also it will be good if you can describe a bit more detailed information about the network setup. Does something like a crash happen before or reinstall from backup etc?

I have solved my problem. The solution was to make a DWORD value for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DisableTaskOffload and set it to 1 on the 2 servers. EnableRSS registry setting with value 0 was already in place. Thanks for the help