No QoS 1 After QoS policies have been applied

All Traffic

Sent Traffic

Dropped Traffic

CMPrePolicyPkt '

CMPrePolicyByte 1

I CMPostPolicyPkt I CMDropPkt

1 1 CMDropByte

All Traffic

Sent Traffic

Dropped Traffic

CiscoWorks QPM uses the information collected in the class-based MIB to build a number of reports showing the effect of QoS policies on the network.

These reports can graphically illustrate the overall input traffic flow divided by traffic class, the traffic that was actually sent, and the traffic that was dropped because of QoS policy enforcement.

In the Reports tab for QPM, under Historical Reports, you can create graphs such as the following:

■ Matching Traffic Per Class Prior to QoS Actions: Graphs that display the traffic that matched each policy group filter before any policy actions were performed

■ Matching Traffic Per Class After QoS Actions: Graphs that display the traffic that matched each policy group filter and was transmitted (not dropped) by the configured QoS policies

■ Matching Traffic Per Class Discarded by QoS Drop Actions: Graphs that display the traffic that matched each policy group filter and was dropped (not transmitted) by QoS policy drop actions

NBAR protocol discovery statistics only available on the configured device

Provides ability to retrieve statistics via SNMP into a central performance monitoring system

Systems, Inc. All rights reserved.

Another important MIB that is used for monitoring QoS is the Cisco NBAR Protocol Discovery (CNPD)-MIB. Using the information collected by this MIB, it is possible to collect detailed protocol and application-level network statistics.

Note NBAR protocol discovery MIB is discussed further in the module "Classification and Marking"

when NBAR is explained.

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