Questions on Receiving SNMP Traps

Question

Hi:
- I have more questions on receiving SNMP traps:
1) the OEM plug-in can receive traps now, but when I click the metric, I see:
Error getting data for target test20. Exception: ORA-20216: ORA-06512: at "SYSMAN.EMD_MNTR", line 817 ORA-01403: no data found ORA-06512: at line 1
- the push descriptor looks like:
<PushDescriptor RECVLET_ID="SNMPTrap">
<Property NAME="MatchEnterprise" SCOPE="GLOBAL">...</Property>
<Property NAME="MatchGenericTrap" SCOPE="GLOBAL">6</Property> <Property NAME="MatchSpecificTrap" SCOPE="GLOBAL">31</Property> <Property NAME="MatchAgentAddr" SCOPE="INSTANCE">target_ip</Property>
<Property NAME="EventsnChasFanIndexOID" SCOPE="GLOBAL">...</Property>
<Property NAME="ContextsnChasFanDescriptionOID" SCOPE="GLOBAL">...</Property>
<Property NAME="SeverityCode" SCOPE="GLOBAL">WARNING</Property>
</PushDescriptor>
- is the Key Property needed ?
2) The alerts for some reason do not filter back to the all targets home page.
- When I click the Home tab and goto to the 'All Targets' pane, I do not see the alert generated by the OEM plug-in.
- What I am doing wrong ?
3) Is it okay to receive traps with the metric usage set to either: HIDDEN or HIDDEN_COLLECT ?
- Does this cause the errors I see in Q 1) ?
Thanks
John
Edited by: user8826739 on Feb 23, 2010 7:05 AM

Answer 1

Hi John,
Can you post the full definition of the metric? You would need to use the Key property for each key column in the metric description.
With the SNMP receivelet you can set up definitons for data points or alerts. I would assume (as I've never tried this ;) that if you set up the definition to be a data point, you would see data from the All Metrics page. To me, it wouldn't make sense for a metric that used the PushDescriptor SNMPTrap to have data to be viewed as the result of the SNMP trap coming is would be an alert. I will have to look into that. My gut reaction is that a metric with PushDescriptor SNMPTrap shouldn't even appear on the All Metrics page ...
To be clear are you saying that you don't see the Warning number under "All Targets Alerts" increase by 1 when you SNMP trap is caught and alert is generated? When this occurs do you see the alert on the target instance homepage?
In regards to HIDDEN and HIDDEN_COLLECT, I don't know what effect they would have on a metric defined for an SNMP trap to raise an alert. You definitely wouldn't want to use HIDDEN as this setting is for temporary metrics that are used in the caclulation of other metrics. HIDDEN metrics are not collected (or hence uploaded to the OMS) and don't appear in the UI. HIDDEN_COLLECT are collected, but do not show up in the UI and are not uploaded. I've never used this settings with SNMP trap metrics that are for alerts. If your metrics for the SNMP trap alerts do show up on the All Metrics page (I'd have to get something set up to look at this), then it could make sense to use the HIDDEN_COLLECT as the alert would still be generated, but the metric itself wouldn't be shown in the UI.
Let me find out the expected behavior from someone on the agent team.
Dave