Congestion Control Support - Cisco ASR 5000 Administration Manual
Enhanced wireless access gateway
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DHCP-based Enhanced Wireless Access Gateway Overview
Number of packets filtered/dropped
Number of packets forwarded to CPU
Note that the other thresholds are platform specific and so are applicable to D-eWAG as well.
The following thresholding models are supported by the system:
Alert: A value is monitored and an alert condition occurs when the value reaches or exceeds the configured high
threshold within the specified polling interval. The alert is generated then generated and/or sent at the end of
the polling interval.
Alarm: Both high and low threshold are defined for a value. An alarm condition occurs when the value reaches
or exceeds the configured high threshold within the specified polling interval. The alert is generated then
generated and/or sent at the end of the polling interval.
Thresholding reports conditions using one of the following mechanisms:
SNMP traps: SNMP traps have been created that indicate the condition (high threshold crossing and/or clear) of
each of the monitored values.
Generation of specific traps can be enabled or disabled on the chassis. Ensuring that only important faults get
displayed. SNMP traps are supported in both Alert and Alarm modes.
Logs: The system provides a facility called threshold for which active and event logs can be generated. As with
other system facilities, logs are generated. Log messages pertaining to the condition of a monitored value are
generated with a severity level of WARNING.
Logs are supported in both the Alert and the Alarm models.
Alarm System: High threshold alarms generated within the specified polling interval are considered
"outstanding" until a the condition no longer exists or a condition clear alarm is generated. "Outstanding"
alarms are reported to the system's alarm subsystem and are viewable through the Alarm Management menu in
the Web Element Manager.
The Alarm System is used only in conjunction with the Alarm model.
Important:
Congestion Control Support
Important:
for lab testing purposes.
The Congestion Control feature enables to specify how the system reacts in a heavy load condition. Congestion control
operation is based on configuring congestion condition thresholds and service congestion policies.
Important:
Congestion Control monitors the system for conditions that could potentially degrade performance when the system is
under heavy load. Typically, these conditions are temporary (for example, high CPU or memory utilization) and are
quickly resolved. However, continuous or large numbers of these conditions within a specific time interval may have an
impact on the system's ability to service subscriber sessions. Congestion control helps identify such conditions and
invokes policies for addressing the situation.
For more information on thresholds, refer to the Thresholding Configuration Guide.
In this release, Congestion Control support is not qualified and is not supported, it is available only
Overload Disconnect is not supported.
Cisco ASR 5000 Enhanced Wireless Access Gateway Administration Guide ▄
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