4000 Router Series ACL and QoS Configuration Guide

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Configuring the maximum available interface bandwidth

The maximum available interface bandwidth refers to the maximum interface bandwidth used for

bandwidth check when CBQ enqueues packets, rather than the actual bandwidth of the physical

interface.

If no maximum available bandwidth is configured for an interface, the following bandwidth is used for

CBQ calculation:

• The actual baud rate or rate if the interface is a physical one.

• 0 kbps if the interface is a virtual interface, for example, tunnel interface or HDLC link bundle

interface.

Configuration guidelines

• HP recommends that you configure the maximum available interface bandwidth to be smaller than

the actual available bandwidth of the physical interface or logical link.

• On subinterfaces, you must configure the bandwidth command to provide base bandwidth for CBQ

calculation.

Configuration procedure

To configure the maximum interface available bandwidth:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter interface view.

interface interface-type interface-number

N/A

3. Configure the maximum

available bandwidth of

the interface.

bandwidth bandwidth-value

For more information about this

command, see Interface

Command Reference.

Setting the maximum reserved bandwidth as a percentage of

available bandwidth

The maximum reserved bandwidth is set on a per-interface basis and decides the maximum bandwidth

assignable for the QoS queues on an interface. It is typically set no greater than 80% of available

bandwidth, considering the bandwidth for control traffic and Layer 2 frame headers.

Use the default maximum reserved bandwidth setting in most situations. When tuning the setting, make

sure the Layer 2 frame header plus the data traffic is under the maximum available bandwidth of the

interface.

To configure the maximum reserved bandwidth on an interface:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter interface view.

interface interface-type

interface-number

N/A