https://community.cisco.com/t5/cisco-software-discussions/cisco-ise-aws-instance-crashing/m-p/5370964#M13402 <P>I have built two Cisco ISE servers in AWS. They are ISE version 3.4.0.608. They are in HA and syncing successfully however the primary ISE has crashed two days in a row since being built. There are no authentication attempts against these ISE servers so no load on them and all ISE health checks have passed. Is there a known issue for ISE servers crashing when created as AWS Instances?<BR /><BR />Both ISE server instances are the instance type C5.4xlarge which is the recommended type for the software. Any help would be much appreciated.</P> Wed, 18 Feb 2026 15:37:48 GMT BumbleIT 2026-02-18T15:37:48Z https://community.cisco.com/t5/cisco-software-discussions/cisco-ise-aws-instance-crashing/m-p/5370964#M13402 <P>I have built two Cisco ISE servers in AWS. They are ISE version 3.4.0.608. They are in HA and syncing successfully however the primary ISE has crashed two days in a row since being built. There are no authentication attempts against these ISE servers so no load on them and all ISE health checks have passed. Is there a known issue for ISE servers crashing when created as AWS Instances?<BR /><BR />Both ISE server instances are the instance type C5.4xlarge which is the recommended type for the software. Any help would be much appreciated.</P> Wed, 18 Feb 2026 15:37:48 GMT https://community.cisco.com/t5/cisco-software-discussions/cisco-ise-aws-instance-crashing/m-p/5370964#M13402 BumbleIT 2026-02-18T15:37:48Z