Setting The Queue Size; Configuring Cbwfq; Overview - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

Setting Up Quality of Service

Configuring CBWFQ

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Specifying the threshold when you enable WFQ is optional. The threshold
determines the maximum number of packets the interface can hold in each
conversation subqueue. When the queue reaches this limit, the ProCurve
Secure Router discards any subsequent packets it receives. You can specify a
threshold from 16 to 512 packets. For example:
ProCurve(config-fr 1)# fair-queue 256
The default threshold is 64.

Setting the Queue Size

You can also specify how many packets an interface can hold in all conversa-
tion subqueues together. Enter:
Syntax: hold-queue <packets> out
You can set the limit between 16 and 1000. The default number of packets that
WFQ interfaces can hold is 400.
The ProCurve Secure Router also uses this setting with interfaces that imple-
ment FIFO queuing. The hold queue size is the maximum number of packets
in the interface's single queue and, so, the limit for the interface. The default
number of packets that FIFO can hold is 200.
Configuring CBWFQ

Overview

CBWFQ is an extension of WFQ that allows you to tailor a QoS policy to your
organization's needs. With CBWFQ, you control:
how traffic is divided into conversation subqueues
how much bandwidth is allocated to each subqueue
You exercise this control by defining classes. For each class, you specify the
traffic matching criterion and set a minimum guaranteed bandwidth. Each
interface implementing CBWFQ supports up to four classes.