In general, the counter is incremented the following reason.
1) SYN timeout
2) RST received
3) Internal exception
Please monitor the following output. If Drop counter is incremented
when failures counter is incremented, ACE drops packets due to
internal exception.
show np 1 me-stats -sicm
show np 1 me-stats -socm
show np 1 me-stats -shttp
If Drop counter is not incremented, failures counter maybe incremented
by syn timeout or rst received. In that case, to isolate the source of the
problem, you will have to get capture trace on both client and server side.
Regards,
Yuji