The following commands helped a client to resolve OEM agent “Availability Evaluation Error”. Just run them in sequence until the issue is resolved.
$ ping omshost $ nslookup omshost $ emctl pingOMS $ emctl config agent addinternaltargets $ emctl secure agent $ emctl config agent listtargets $ emctl clearstate agent $ emctl upload agent $ emctl reload agent The agent should show UP now, otherwise continues the following steps: $ emctl stop agent $ emctl secure agent $ emctl clearstate agent $ emctl secure agent $ emctl start agent $ emctl upload agent $ emctl reload agent $ emctl pingOMS $ emctl status agent