Unable to Discover Exadata Database Nodes in EM 12c When Using Backup Hostname
(Doc ID 1530073.1)
Last updated on JANUARY 31, 2020
Applies to:Enterprise Manager Base Platform - Version 220.127.116.11.0 to 18.104.22.168.0 [Release 12.1]
Enterprise Manager for Exadata - Version 22.214.171.124.0 to 126.96.36.199.0 [Release 12.1]
Information in this document applies to any platform.
Discovery of an X3-2 Exadata Database Machine target in EM Cloud Control 188.8.131.52.1 fails to find Compute Nodes and errors with:
"The selected compute node is not an existing host target managed by Enterprise Manager. Please add the compute node as managed target before you continue."
The agent is installed using a custom (additional) hostname for management network, in this case this interface is used for RMAN backups.
Example: <HOST_NAME>.<DOMAIN_NAME> << This is where the agent was installed
Hostname: <HOST_NAME>.<DOMAIN_NAME> << This is what the "hostname" command returns on the compute node itself
IB switches ibnetdiscover show: <HOST_NAME>.<DOMAIN_NAME> << This is the ADMIN hostname
Installed the agent on a dedicated hostname that is used for Management traffic (RMAN and DataGuard)
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