Allocating Bandwidth To A Class - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

Setting Up Quality of Service
Configuring CBWFQ
7-26
Instead of placing all bridged traffic in a class, you can place only NetBIOS
Extended User Interface (NetBEUI) traffic. NetBEUI allows hosts to commu-
nicate within the LAN. You can define such traffic as a class of its own. For
example:
ProCurve(config)# qos map Class 12
ProCurve(config-qos-map)# match protocol bridge netbeui

Allocating Bandwidth to a Class

You can allocate bandwidth for classes with absolute or relative values. For
example, you define three classes on an interface with a 2 Mbps connection.
You could allocate 500 Kbps to one class, 250 to another, and 200 to the last.
Or you could allocate 25 percent of the bandwidth to one class, 12 percent to
another, and 10 percent to the last. The ProCurve Secure Router allows you
to reserve up to 75 percent of an interface's bandwidth for all classes together.
If you have configured one or more low-latency queues on the interface, you
might want to divide the remaining bandwidth rather than the total band-
width. This option eases the configuration process; you do not have to figure
out how much bandwidth must be reserved for the low-latency queues.
You assign a class its bandwidth from the configuration mode for the QoS map
entry that defines it. You must specify bandwidth in the same way (absolute,
percentage, or remaining percentage) for each class in the QoS map.
To specify the maximum bandwidth guaranteed to the queue, move to the QoS
map entry for the class and enter:
Syntax: bandwidth [<Kbps> | percent <percentage> | remaining percent <percentage>]
For example, to set the bandwidth as an absolute value, enter:
ProCurve(config-qos-map)# bandwidth 500
To specify bandwidth as a percentage of total bandwidth, use the percent
keyword:
ProCurve(config-qos-map)# bandwidth percent 25
The percent keyword calculates bandwidth from the total available band-
width on an interface. The total available bandwidth is the access rate for
Point-to-Point Protocol (PPP) and High-level Data Link Control (HDLC) inter-
faces and for ATM subinterfaces. The total available bandwidth is the rate-
limited bandwidth for Ethernet and Frame Relay interfaces. However, you can
only allocate up to 75 percent of the available bandwidth to queues.