removed it still no response,
the SZ is reachable
when i run the "show sz logs"
{"serial_number":"XXXXXXXX", "ipaddress":"10.31.3.210", "macaddress":"XXXXXXXXX", "switch/stack/spx":"stack", "numOfUnits":2, "firmware_version":"SPS08090b.bin", "switch_model":"ICX7150-C12P"}
==============
Jul 11 18:06:29:https_connmgr_send_request>Entered.
Jul 11 18:06:29:sz_execute_state_machine>Exit with state/event: SZ QUERY/5, TIMER/2002 RC: 1
Jul 11 18:06:29:sz_execute_state_machine>Entering with state/event: SZ QUERY/5, SZ QUERY RESPONSE/2007
Jul 11 18:06:29:sz_parse_sz_query_response -- Status: 600 <<
Jul 11 18:06:29:sz_execute_state_machine>Exit with state/event: SZ QUERY/5, SZ QUERY RESPONSE/2007 RC: 1
Jul 11 18:06:29:HTTP Request Error:Http remote connection close called.
End i/max/iter 436/436/0