H3C Technologies H3C Intelligent Management Center - Manual (Page 663)

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• Length of Trap Queue: defines the maximum number of traps that are kept. Traps in the trap queue
are matched against incoming traps to determine if there is a duplicate trap match. A long trap
queue length ensures that the filter catches more traps and a shorter trap queue length reduces the
number of traps filtered by this filter. The default is 5000 trap entries. The minimum is 100 and the
maximum is 5000.
8. Click the Use Sliding Time Window box if you want a sliding window time counter applied to
the Length of Time window for this filter rule.
9. Leave the box unchecked if you want to apply a fixed time window.
10. Click OK.
Modifying the unknown trap filter rule
Devices in the network infrastructure are often configured to send traps to management systems even
when the management system is not configured to receive them. Thus, these traps are unknown and
indecipherable to IMC. This filter allows you to remove unknown traps from IMC views and reports.
To modify the Unknown Trap Filter:
1. Navigate to Filtering Trap.
a. Click the Alarm tab from the tabular navigation system on the top.
b. Click Trap Management on the navigation tree on the left.
c. Click Filtering Trap under Trap Management from the navigation system on the left.
2. Click the Modify icon to the right of the Unknown Trap Filter.
3. Click the Escalate to alarms box if you want an alarm to be sent to and displayed in IMC if the
number of traps received for unknown traps exceeds the value configured in the Threshold field.
If you check this box, you need to define the threshold setting. Threshold determines how many
traps are received before IMC generates an alarm. The default is 1000.
4. Click the checked Escalate to alarms box if you do not want to receive any alarms in IMC
notifying you that devices in the network infrastructure are sending traps that are unknown to IMC.
The Escalate to alarms box must be checked to have the ability to configure the parameters of this
trap filter rule.
5. Click the Filter Unknown Traps box if you want IMC to discard all traps for which the trap type
is unknown to IMC.
6. Click the checked box if you want IMC to receive and report unknown traps.
7. Click OK.
Modifying Trap Filter Configuration of Devices not in IMC
Devices in the network infrastructure are often configured to send traps to management systems even
when the management system is not configured to manage these devices and receive traps from them.
This filter lets you discard traps from devices not in IMC.
To modify the Trap Filter of Devices not in IMC:
1. Navigate to Filtering Trap.
a. Click the Alarm tab from the tabular navigation system on the top.
b. Click Trap Management on the navigation tree on the left.
c. Click Filtering Trap under Trap Management from the navigation system on the left.
2. Click the Modify icon to the right of the Unmanaged Devices' Trap Filter.