Load balancing(LLB) icmp health check no logs

[Jeff_Gao]

Dear all

  I have a question,i find that  load balancing icmp health check no logs in fw

as following:

I can capture the icmp health check traffic in fw every 5 sec

but there is no logs in smartlog,as following：

Why there is no icmp health check logs in smartlog,thanks?

[Jeff_Gao]

LLB icmp health check per 5 sec

[Jeff_Gao]

topology:
LLB------CP(Bridge)----Core SW
LLB icmp health check core sw ip

[PhoneBoy]

What does your Global Properties say for ICMP?
That can be accepted by Global Properties and won't log.

[Jeff_Gao]

The below result is mine understand:
icmp virtual session timeout:

there is a icmp virtual session timeout in global properties--stateful inspection.the default value of icmp virtual session timeout is 40s. FW will generate a icmp virtual session when a host have a icmp traffic,this virtual icmp session will keep 40s and only generate one log record.

All subsequent icmp traffic will match this virtual icmp session before this virtual session timeout,So there's only one log record, the one that starts with.

If  virtual icmp session is timeout,all subsequent icmp traffic will generate a new log record.

[PhoneBoy]

I had forgotten about that, and it would cause the behavior you describe.