Appendix A IPM FAQs and Troubleshooting Tips
Troubleshooting IPM
Q.Did you create any collectors when no LUs were available?
A.Each collector creates a logical unit (LU) connection to the mainframe. Therefore, if you create collectors when all LUs were used, those collectors accrue no data for Real Time or Historical graphs. For example, if 20 LUs were activated by the host (mainframe) and 20 LUs were used for 20 collectors, the 21st created collector would accrue no statistics. The Real Time graph displays “No Connection” for the Last Data Point.
To avoid this problem, make sure the number of collectors you create is equal to or less than the number of LUs defined on the mainframe. To display the number of LUs defined on the mainframe that are still available, use the show sna IOS command.
Q.Did you create any HTTP collectors that require authentication?
A.If you create an HTTP collector using a URL Lookup String that requires authentication (that is, a user name and password), no statistics are collected. The HTTP General Error or HTTP Timeout Error window appears.
Similarly, if you create an HTTP collector and specify a URL Lookup String that is separated from the source router by a firewall, no statistics are collected. The Real Time graph displays the “TCP Timeout” error message. You might see a DNS error message as well, if there is no entry in the DNS table for the URL Lookup String. Also current version of IPM does not support proxy environment.
Q.Did you specify any incorrect target PU names?
A.When you run an SNA collector, use the PU you defined for the source router as the target PU name. When you use service point PUs, use the service point PU name configured in the router as the target PU name.
In the following example, the source router is
sna host IPM2500A
Q.Did you specify any incorrect IP addresses?
A.If you receive a No Connection error from the Real Time graph when you create DLSW collectors, make sure the DLSW source IP address and target IP address are both correct. Use the
View > Properties menu option to display these addresses. If either address is missing or incorrect, add the correct address and recreate the collector with the correct addresses.
Q.Did you specify large mainframe RU sizes?
A.When you modify Request Payload and Response Payload sizes (for
Q.How do I change the IP address or host name of an IPM server?
A.If you must change the IP address or host name of the server on which IPM is running, keep the following considerations in mind:
•If you change the IP address of the IPM server, but the host name of the server remains unchanged, IPM is not impacted. If the /etc/hosts, host name, DNS, Network Information Services (NIS), netmask, and so on are all configured correctly with the new IP address, the IPM server and client work correctly after you reboot the system.
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