SCCM Network Discovery (Full Version)

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dnewhart -> SCCM Network Discovery (10/8/2008 10:33:16 AM)

Network Discovery is enabled with "Topology, client and OS" selected.  Two subnets are added to the "Subnets" tab, with search local subnets checked.  Domains tab is not enabled, SNMP maximum hops is set to 5 with 2 Community names specified "public" and "Public"  Several  SNMP devices are added to the SNMP Devices tab.  These are the routers encounted via tracert between the SCCM and an XP machine on one of the subnets listed onthe subnets tab.  No DCHP servers are listed and "Always use..." is unchecked on the DCHP Tab.  Discovery is set to run for 2 hours.  SCCM SQL database is located on a SQL farm on same subnet as the SCCM server.  I am viewing the results next day.
Issue:  Network discovery finds ONLY the SCCM server and the router for the subnet that the SCCM server is on.  netdisc.log does not list any errors. No new "locked" subnets appear on the Subnets tab.  There are at least 250 total devices on the two subnets scanned (apparently not very well??) 
Any thoughts?



gjones -> RE: SCCM Network Discovery (10/8/2008 11:03:41 AM)

From: http://technet.microsoft.com/en-ca/library/bb932200.aspx

Network Discovery runs but does not find any computers.
Solution

Network Discovery will create a DDR for a resource only if it can positively determine the resource's subnet mask or Active Directory site. The subnet mask can be determined if the following conditions are met:
  • The client's IP address is listed in a trusted router's ARP cache, and the router has only a single IP address on that interface.
  • The client has a Simple Network Management Protocol (SNMP) agent running, and Network Discovery is configured to use the community name the client is configured for.
  • The client is a Microsoft Dynamic Host Configuration Protocol (DHCP) client.





    [image]http://i.technet.microsoft.com/Bb932200.note(en-us,TechNet.10).gif[/image]Note

    The site server computer account must have domain user credentials in the same domain as the DHCP server.
 



dnewhart -> RE: SCCM Network Discovery (10/8/2008 11:27:02 AM)

Thanks, I will look at these scenarios...

D



dnewhart -> RE: SCCM Network Discovery (10/8/2008 1:05:24 PM)

Site server did not have access to DHCP server.
Added a Community String.

Voila!

THanks!

D



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