H3C Technologies H3C Intelligent Management Center - Manual (Page 660)

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Trap filtering lets you distinguish between traps received by devices in the infrastructure that are useful
from those that are not before traps are translated into alarms for viewing and notification.
You can create user defined trap filter rules and modify them in IMC.
Viewing IMC trap filter rules
To view existing IMC trap filter rules:
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.
IMC is configured with the following trap filter rules.
• Duplicate Trap Filter: This filter rule reduces the possibility of event storms in IMC by filtering out
duplicate traps from reporting and display when thresholds are met.
• Intermittent Trap Filter: This filter rule reduces the possibility of event storms by detecting when there
is an intermittent problem in the network and setting thresholds when intermittent issues occur to
eliminate the redundant alarming that occurs when intermittent issues arise.
• Unknown Trap Filter: Devices in the network infrastructure are often configured to send traps to
management systems even when the management system is not configured to manage the source
of the trap. Thus, these traps might be unknown and indecipherable to IMC. This filter rule lets you
remove unknown traps from IMC views and reports.
• Trap Filter 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 rule lets you remove these traps from IMC views
and reports.
Only administrators or operators who are members of a group with the ADMIN privilege level can
add or modify trap filters.
Modifying the duplicate trap filter rule
This filter reduces the possibility of event storms in IMC by filtering out duplicate traps from reporting and
display once thresholds are met.
To modify the Duplicate Trap Filter rule:
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 Duplicate Trap Filter.
3. Click the Escalate to alarms checkbox if you want an alarm to be generated and displayed in
IMC if the number of traps received for each duplicate trap type exceeds the value configured in
the Threshold field.
If you check this box, you need to define the threshold setting. Threshold determines how many
duplicate traps are received before IMC generates an alarm. The default is 100.
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 duplicate alerts for the same
error condition.