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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
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Chapter 4 Configuring Virtual Contexts
Setting Resource Usage Thresholds to Receive SNMP Notifications
For each resource, you can specify the high, low, and watermark thresholds, which operate as follows:
• High—Indicates the highest value of the threshold defined. This value is configured as a percentage
between 1 to 100 and is represented as the highest percentage of the maximum number of allocated
resources. The ACE sends a notification/trap to the SNMP when the current resource usage exceeds
the highest threshold value.
• Low—Indicates the lowest value of the threshold defined. This value is configured as a percentage
between 1 to 100 and is represented as the lowest percentage of the minimum number of allocated
resources. The ACE sends a notification/trap to the SNMP when the current resource usage is less
than the specified lowest threshold value.
Note You cannot set a lower limit for active SSL connections, CPU utilization, and memory
utilization because there is no lower limit imposed on these resources.
• Watermark—Indicates the defined watermark threshold. A watermark is configured as a percentage
between 1 to 100 and is represented as the percentage of the maximum and minimum allocated resource,
which operates as follows:
–
High watermark—The ACE sends a Falling Watermark notification when the current resource
usage level exceeds the high watermark value.
–
Low watermark—The ACE sends a Rising Watermark notification when the current resource usage
level is below the low watermark value.
Prerequisites
• The context is configured for SNMP (see the “Configuring SNMP for Virtual Contexts” section on
page 4-19).
• A resource class is configured and associated with the context (see the “Managing Resource
Classes” section on page 4-35).
Procedure
Step 1 Choose Config > Virtual Contexts > context > System > Resource Usage Threshold.
The Resource Usage Threshold window appears.
Step 2 From the Resource Usage Threshold window, specify the high, low, and watermark percentages.
Enter the percentage values using the following guide:
1 <= Low < Watermark < High <= 100 (percent)
Decimal values are not allowed.
Step 3 Click Deploy Now.
Concurrent connections All
Connection rate All
Table 4-11 Monitored Resources with the Virtual Context
Resources Virtual Context
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