Appendix K Router Platform User Interface Reference

Quality of Service Policy Page

Table K-95 QoS Class Dialog Box—Queuing and Congestion Avoidance Tab (Continued)

Bandwidth

The minimum bandwidth to guarantee to this class (a specific class or the

 

default class). You can define this amount by:

 

Percentage—Valid values range from 0 to 100% of the total available

 

bandwidth.

 

Kbit/sec—Valid values range from 8-2000000 kilobits per second.

 

 

Queue Limit

The maximum number of packets that can be queued for the class. Any

 

additional packets are dropped using tail drop until the congestion is gone.

 

Note This is the default option for limiting queue size unless Weighted

 

Random Early Detection (WRED) is configured.

 

 

WRED Weight for

The exponential weight factor to use to calculate the average queue size. Use

Mean Queue Depth

this option when defining WRED instead of tail drop for this class. When

 

queue size exceeds the value determined by this weight factor, WRED

 

randomly discards packets until the transmitting protocol decreases its

 

transmission rate to ease congestion. Exponent values range from 1 to 16.

 

The default is 9.

 

Note This option is best suited for protocols like TCP, which respond to

 

dropped packets by decreasing the transmission rate. We recommend

 

that you do not change the default unless you determine that your

 

applications would benefit from the change.

 

 

QoS Class Dialog Box—Policing Tab

Use the Policing tab of the QoS Class dialog box to configure rate limits on the traffic in a selected QoS class. Excess traffic is either dropped or transmitted with a different (typically lower) priority.

Navigation Path

Go to the QoS Class Dialog Box, page K-205, then click the Policing tab.

Related Topics

Defining QoS Class Policing Parameters, page 15-175

Defining QoS on Interfaces, page 15-165

Defining QoS on the Control Plane, page 15-168

 

User Guide for Cisco Security Manager 3.2

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OL-16066-01

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