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K-215
User Guide for Cisco Security Manager 3.2
OL-16066-01
Appendix K Router Platform User Interface Reference
Quality of Service Policy Page
• Quality of Service Policy Page, page K-199
Field Reference
Table K-96 QoS Class Dialog Box—Policing Tab
Element Description
Enable Policing When selected, enables you to configure Class-Based Policing to control the
maximum rate of traffic for this class. Security Manager uses a two-token
bucket algorithm, which includes a defined violate action that is performed
when neither bucket can accommodate the incoming packet.
When deselected, disables all policing options for the selected QoS class.
CIR The average data rate (also known as the committed information rate or
CIR). You can define this amount by:
• Percentage—Valid values range from 0 to 100% of the overall available
bandwidth.
• Bit/sec—Valid values range from 8000 to 2000000000 bits per second.
In the token bucket algorithm, this rate represents the token arrival rate for
filling both token buckets. Traffic that falls under this rate always conforms.
Note When you configure Understanding Control Plane Policing,
page 15-163, you must define the CIR in bits per second.
Conform Burst The normal burst size, which determines how large traffic bursts can be
before some traffic exceeds the rate limit. In the token bucket algorithm, it
represents the full size of the first (conform) token bucket.
The range of valid values is determined by the CIR:
• When the CIR is defined by percentage—Valid values range from 1 to
2000 milliseconds.
• When the CIR is defined by an absolute value—Valid values range from
1000-512000000 bytes.