Hi the topology is like this: User PC (wireless) ----- switch1 ---- swithch2 -----(inside)ASA. All switch are layer3 switch.
Switch1, switch2 and ASA can ping each other. PC, switch1 and swich2 also can ping each other. but the PC and ASA cannot ping each other. When PC ping ASA, the ASA can get debug message "ICMP echo request from (PC ip address)" but not "ICMP echo reply from..."
I think the issue is in switch. Do you think so ? Thank you