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IP Internals

CA APM Cross-Enterprise monitors data for the following metrics from a connected CA NetMaster NM for TCP/IP region:

IP Fragmentation (%)

Displays the percentage of IP fragmentation.

IP Reassembly (%)

Displays the percentage of IP reassemblies.

TCP Retransmission (%)

Displays the percentage of TCP retransmissions.

UDP Discards (%)

Displays the percentage of UDP discards.

Note: These percentage metrics show the latest sample values of the unqualified stack attributes. The value is the maximum of the latest attribute sample values over all monitored stacks (sample must have been within the last hour).

Stack Names

Displays the names of all monitored stacks on this LPAR.

These metrics provide a broad indicator that at least one of the monitored stacks on this LPAR has exceeded a stack internal performance threshold recently.

For example, an IP Fragmentation % value of 13 means that one of the IP stacks active on this LPAR had this value the last time IP Fragmentation was sampled.

Identify and examine in detail the individual stack with the high IP Fragmentation % value using the CA NetMaster NM for TCP/IP region. See the Condition Summary, Stack IP, TCP, and UDP Layers section.

To send metrics continually for a specific IP stack, specify the stack name in the Performance Monitoring filter. You specify the filter in the APMEPAGENT parameter group of the region.