ACS does not support interoperability between ACS 5.4 and ACS 5.5 deploymentsThe deployment upgrade process consists of the following phases:• Upgrading the Log Collector Server, • Upgrading the Secondary Servers, • Upgrading the Primary Server, 

You can use the following upgrade paths to upgrade the ACS server from 5.x versions to ACS 5.5:• Path 1: ACS 5.4 to ACS 5.5. To upgrade from ACS 5.4 to 5.5, see Upgrading an ACS Server from5.4 to 5.5, page 11-11.• Path 2: ACS 5.3 to ACS 5.5. To upgra...

You can use the following upgrade paths to upgrade the ACS server from 5.x versions to ACS 5.5:• Path 1: ACS 5.4 to ACS 5.5. To upgrade from ACS 5.4 to 5.5, see Upgrading an ACS Server from5.4 to 5.5, page 11-11.• Path 2: ACS 5.3 to ACS 5.5. To upgra...