Article ID: 228900 - View products that this article applies to.
This article was previously published under Q228900
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Microsoft Systems Management Server Network Discovery may not report discovery data for computers that have static IP addresses. Viewing the Netdisc.log (logging must be enabled via Systems Management Server Service Manager) reveals that the computer is found and it's IP address is identified, but a Data Discovery Record (DDR) is not written. A DDR is not written unless the subnet mask of the computer can be positively determined.
Systems Management Server Network Discovery can determine the subnet mask of the client from the following sources:
ARP -a routerIPaddress
Since entries do age out of the ARP cache, it may be necessary to schedule network discovery to run multiple times to find all machines. Also, if a machine is especially "quiet" it may not appear in the ARP cache of the local router. Any communication across a router, such as a ping to a remote network, will add the machine to the ARP cache of the router.
NOTE: When topology, topology and client, and topology, client and client operating system network discovery is enabled, Microsoft Windows 95, Windows 98, or Windows Millennium Edition clients only report discovery datas if they have File and Print sharing enabled.
Computers that have statically assigned addresses can be added to a DHCPs RESERVED list and be successfully discovered with Network Discovery. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/236036/EN-US/ )SMS: NetDisc Fails to Discover Static IP Addresses Reserved
Article ID: 228900 - Last Review: January 11, 2015 - Revision: 2.6