Configuring The Maximum Available Interface Bandwidth - HP A6600 Configuration Manual

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 bandwidth used for CBQ calculation
is as follows:
If the interface is a physical one, the actual baud rate or rate applies.

If the interface is an E1, MFR, or any other type of logical serial interface formed by timeslots or multiple

links, the total bandwidth of all member channels/links applies.
If the interface is a template interface, a VT for example, 1,000,000 kbps applies.

If the interface is a virtual interface, a tunnel, Layer 3 aggregate, HDLC link bundle interface, or RPR

logical interface for example, 0 kbps applies.
To do...
1. Enter system view.
2. Enter interface view.
3. Configure the maximum available
bandwidth of the interface.
NOTE:

HP recommends configuring the maximum available interface bandwidth to be smaller than the actual available
bandwidth of the physical interface or logical link.

On a primary channel or template interface (such as VT) configured with qos max-bandwidth, AF and EF queues
perform queue bandwidth check and calculation based on the bandwidth specified with qos max-bandwidth; so
do the AF and EF queues synchronized to the subchannel interfaces (for example, VA interfaces or B channels).
Subchannel interface bandwidth is ignored. Because the QoS configurations of the primary channel interface and
the subchannel interfaces are the same, prompts are output only for the primary channel interface. If qos
max-bandwidth is not configured, AF and EF queues on the primary channel interface calculate queue bandwidth
based on 1 Gbps of bandwidth, and AF and EF queues synchronized to the subchannel interfaces calculate queue
bandwidth based on actual subchannel interface bandwidth. If queuing on a subchannel interface fails due to
bandwidth change, the prompt will be output for the subchannel interface.

On an MP-group interface or MFR interface configured with qos max-bandwidth, AF and EF perform queue
bandwidth check and calculation based on the bandwidth specified with qos max-bandwidth. On an MP-group
interface or MFR interface without qos max-bandwidth configured, if the sum of subchannel bandwidth equals to
or exceeds the sum of AF bandwidth and EF bandwidth, AF and EF calculate bandwidth based on the actual
interface bandwidth; otherwise, AF and EF calculate bandwidth based on 1 Gbps of bandwidth, and the message
indicating insufficient bandwidth is displayed. In the latter case, the queuing function may fail to take effect.

On tunnel interfaces, subinterfaces, Layer 3 aggregate interfaces, HDLC link bundle interfaces, RPR logical
interfaces, or VT interfaces configured with PPPoE, PPPoA, or PPPoEoA encapsulation at the data link layer, you must
configure qos max-bandwidth to provide base bandwidth for CBQ calculation.
Configuration example
Network requirements
1.
Set the maximum available bandwidth of an interface to 60 kbps.
Configuration procedure
2.
# Enter system view.
<Sysname> system-view
Command...
system-view
interface interface-type interface-number
qos max-bandwidth bandwidth
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Remarks
—
—
Required.