2008 event equivalent of 2003 Netlogon 5807 event

Question

I have a custom Opsmgr rule that alerts me when our Network team has made a new subnet and not told us about it.
I am upgrading all my DC's to 2008 and need to find the equivalent event to update this rule. I have a 2008 DC with missing subnets and cannot find any events to indicate this. I know that many event numbers were incremented by 4096 between 2003/2008. There
are no events numbered 9903, and no events that contain phrases from the old event like "undefined site" or "existing sites"
Does anyone know if such an event is still logged, and if so, what is the source/number?
Thanks
Example of the old event from a Win2003 DC:
Event Type:         Warning
 Event Source:         NETLOGON
 Event Category:         None
 Event ID:         5807
 Date:                 1/10/2003
 Time:                 10:59:53 AM
 User:                 N/A
 Computer:          DC1
 Description:
 During the past 4.18 hours there have been 21 connections to this Domain Controller
 from client machines whose IP addresses don't map to any of the existing sites in the
 enterprise. Those clients, therefore, have undefined sites and may connect to any
 Domain Controller including those that are in far distant locations from the clients.
 A client's site is determined by the mapping of its subnet to one of the existing
 sites. To move the above clients to one of the sites, please consider creating subnet
 object(s) covering the above IP addresses with mapping to one of the existing sites.
 The names and IP addresses of the clients in question have been logged on this
 computer in the following log file '%SystemRoot%\debug\netlogon.log' and,
 potentially, in the log file '%SystemRoot%\debug\netlogon.bak' created if the former
 log becomes full. The log(s) may contain additional unrelated debugging information.
 To filter out the needed information, please search for lines which contain text
 'NO_CLIENT_SITE:'. The first word after this string is the client name and the second
 word is the client IP address. The maximum size of the log(s) is controlled by the
 following registry DWORD value 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
 Netlogon\Parameters\LogFileMaxSize'; the default is 20000000 bytes. The current
 maximum size is 20000000 bytes. To set a different maximum size, create the above
 registry value and set the desired maximum size in bytes.

Answer 1

Hi,
I’d like to 
confirm the number of the IP range.
If a new range of IP addresses is added to the network, it needs to create a subnet object in Active Directory to correspond to the range of IP addresses.
To create a subnet object, you must have the following information:
Ø 
The site to which the subnet is to be associated.
Ø 
The network address or any IP address in the range.
Ø 
The subnet mask.
The term "subnet" in AD DS does not have the strict networking definition of the set of all addresses behind a single router. The only requirement for an AD DS subnet
is that the address prefix conforms to the IP version 4 (IPv4) or IP version 6 (IPv6) format.
Please refer the following links to untie the doubts:
Managing Sites
http://technet.microsoft.com/en-us/library/bb727051.aspx#ELAA
Appendix B - Procedures Reference
http://technet.microsoft.com/en-us/library/bb727062.aspx#E0MD0AA
Understanding Sites, Subnets, and Site Links
http://technet.microsoft.com/en-us/library/cc754697.aspx
Chapter 4 – Subnetting
http://technet.microsoft.com/en-us/library/bb726997.aspx
Hope this helps!