Something

capsd 

    <protocol-plugin protocol="BridgeStatus" class-name="org.opennms.netmgt.capsd.plugins.SnmpPlugin" scan="on" user-defined="false">
        <property key="vbname" value=".1.3.6.1.4.1.2021.8.1.100" />
        <property key="timeout" value="2000" />
        <property key="retry" value="1" />
    </protocol-plugin>
poller config


    <service name="BridgeStatus" interval="300000" user-defined="false" status="on">
      <parameter key="retry" value="2"/>
      <parameter key="timeout" value="3000"/>
      <parameter key="port" value="161"/>
      <parameter key="oid" value=".1.3.6.1.4.1.2021.8.1.100"/>
      <parameter key="operator" value="&gt;="/>
      <parameter key="operand" value="2"/>
    </service>

  <monitor service="BridgeStatus" class-name="org.opennms.netmgt.poller.monitors.SnmpMonitor" />




snmpwalk -v2c -c public someserver .1.3.6.1.4.1.2021.8.1.100
UCD-SNMP-MIB::extResult.1 = INTEGER: 2