CISCO SNMP router / switch - timeout in Classify/ Identification phase - troubleshootingIssue You might see: Warning SNMP probe timed out. Target is either unreachable or there are no valid credentials for it. SNMP (empty) SNMP Classify w.x.y.z Symptoms: Run discovery to switch or router get following error in discovery pattern log:2018-08-30 14:09:55: Error during walk from host xx.xxx.xx.xxx. TableEvent:-1. Error Message: Request timed out.2018-08-30 14:09:55: Failed to get SNMP scalar 1.3.6.1.2.1.4.1 from host xx.xxx.xx.xxx community: ******Causesnmp timeoutResolutionTest the credential and whether it validates OK Add following mid server parameters to higher value.mid.snmp.request.timeoutmid.snmp.session.timeout"By default, they are 1500 millisecond. In my case, I have to increase to 6000 milliseconds in order to fix the issue."KB0712512 - Unable to discover switch or router with Identification engine error From the Mid Server DEBUG processing the "Network Switch" pattern I can see the issue:09/16/19 15:06:25 (503) Worker-Standard:HorizontalDiscoveryProbe-be529be3db73bb00a5c7f69f2996193b DEBUG: (99)SNMPProviderImpl - Failed to get SNMP scalar 1.3.6.1.2.1.17.1.2 from host w.x.y.z USM User: null 09/16/19 15:06:25 (503) Worker-Standard:HorizontalDiscoveryProbe-d1629be3db73bb00a5c7f69f2996192c SEVERE *** ERROR *** (107)SNMPProviderImpl - Error during walk from host w.x.y.z. TableEvent:-1. Error Message: Request timed out. Do an snmpwalk and notice the timeout for 1.3.6.1.2.1.17.1.2 from host w.x.y.zKB0696727 - MID Server SNMP TroubleshootingFurther troubleshooting of the credential we found that if we reduced to AES128 we no longer saw the problem.There is a known issue regarding CISCO and AES256: PRB1348201 which is fixed in Madrid Patch 8, New York Patch 2, Orlando.The workaround is to use AES128 on the permission for CISCO Switch.