ProCurve 2610-PWR Technical Information download pdf (Page 206)

Quality of Service (QoS): Managing Bandwidth More Effectively

Preparation for Configuring QoS

ToS Diff-Services QoS Up to 64 rules per switch, depending on how the switch is configured

QoS Classifier Rules Used

VLAN QoS 1 rule per port membership in a QoS-specified VLAN. If a port belongs

to multiple, QoS-specified VLANs, then 1 rule is used for each such

VLAN membership.

Source-Port QoS 1 rule for each port configured for source-port QoS.

Planning and Monitoring Rule Usage

The following two CLI commands are useful for planning and monitoring rule

usage in a QoS configuration.

Syntax: qos resources help

Provides a quick reference on how QoS uses rule resources

for each configuration option. See table 6-8.

Syntax: show qos resources

Shows the number of rules that have been used out of the total

rules available for that feature. This command is useful for

verifying rule availability as you proceed with configuring

QoS.

Managing QoS Resource Consumption

As shown in table 6-8, QoS classifiers use 1, 2, or 8 rules depending on the

classifier selected. Extensive QoS configurations can either fully subscribe

the rules available or leave an insufficient number of rules available for

configuring another QoS policy on the switch. If there are not enough rules to

support another QoS policy, you cannot configure an additional policy.

Problems with an insufficient number of rules available can occur in either of

the following QoS scenarios:

■ Attempting to configure a policy when there are an insufficient number

of rules available

■ Attempting to add a port to a QoS-configured VLAN where the policy

already on the VLAN requires more rule resources than are available.

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ProCurve 2610-PWR Technical Information Page 206