Cached IP Address Never Expires for SNMP Trap Destination
Article ID: 168451
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0 Standard Edition
This article was previously published under Q168451
SYMPTOMS
In the Simple Network Management Protocol (SNMP) Service Configuration, the
trap destination can be entered as a host name or IP address. The host name
is resolved to an IP address when the SNMP Agent loads, and is cached until
the computer with the SNMP agent is restarted, or the SNMP service is
stopped. This cached address is only used by SNMP; other services will do a
name query to find this IP address.
If the SNMP Agent is configured to send traps based on host name, and the
IP address changes on the SNMP Management Station at some point after the
SNMP Agent is started on the Windows NT computer, the trap would not be
received.
WORKAROUND
If host names are used for trap destinations, and the IP address of a
Network Management station changes, be sure to stop and restart the SNMP
service on the Windows NT computer. The SNMP service can be stopped and
started by using the Services tool in Control Panel, or by typing net
stop SNMP and net start SNMP at the command line.
You can also use an IP address for the trap destination; and modify this
address if needed.
STATUS
Microsoft has confirmed this to be a problem in Windows NT. We are
researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.
Additional query words: caching
Keywords: kbbug kbnetwork kbsnmp KB168451