Dell IDRAC6 User Manual page 323

To access/configure the iDRAC6 SNMP agent community name using the
Web-based interface, go to Remote Access Network/Security Services
and click SNMP Agent.
To prevent SNMP authentication errors from being generated, you must
enter community names that will be accepted by the agent. Since the
iDRAC6 only allows one community name, you must use the same get and
set community name for IT Assistant discovery setup.
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Monitoring and Alert Management