Oracle Basic SNMP Monitoring

[Stalin]

Hi There,

Anyone monitoring DBs via SNMP using oracle database MIBs. We are
trying to monitor pretty basic stuff like tablespace usage, DB connect
success/failure etc and have it monitored through a centralized
management console like zenosses. We are hitting a dead end with
getting snmp to work with default oracle install. I believe oracle and
management agents gets installed only if you install EM grid control.
What agents are required to setup from a default install. Any pointers
would be appreciated.

BTW, environment sol10, 11gr2.

Thanks,
Stalin