Fragmentation failure percentage is the total number of IP output segments requiring fragmentation that could not be fragmented, divided by the total number of IP segments requiring fragmentation. Fragmentation failure is caused when the no frag bit is set in the segment. Fragmentation allows delivery of a message through intermediate hosts that do not accept larger segment sizes. If fragmentation failure is excessive isolate the source of the segments with the no frag bit set, using the diagnostic procedures outlined in theIBM z/OS Communications Server IP Diagnosis Guide, and take corrective action.
By default, this situation does not start automatically and must be manually started to run.