Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 718)

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Committed rate refers to the guaranteed bandwidth for traffic entering or leaving the interface under

normal network conditions. When traffic propagates at an average rate that is less than or equal to the

committed rate, it is considered to be green-colored or coded. When the transmitted traffic falls below

the committed rate, the bandwidth, which is not used by any traffic that is traversing the network, is

aggregated to form the committed burst size. Traffic is considered to be green-colored up to the point at

which the unused bandwidth does not exceed the committed burst size.

Peak rate refers to the maximum rate for traffic arriving or exiting an interface under normal traffic

conditions. Peak burst size indicates the maximum size of unused peak bandwidth that is aggregated.

This aggregated bandwidth enables brief durations of burst traffic that exceeds the peak rate and

committed burst.

In releases of Dell Networking OS earlier than Release 9.3(0.0), you can configure only the maximum

shaping attributes, such as the peak rate and the peak burst settings. You can now specify the committed

or minimum burst and committed rate attributes. The committed burst and committed rate values can be

defined either in bytes or pps.

You can use the rate-shape pps peak-rate burst-packets command in the QoS Policy Out

Configuration mode to configure the peak rate and burst size as a measure of pps. Alternatively, you can

use the rate shape kbps peak-rate burst-KB command to configure the peak rate and peak burst

size as a measure of bytes.

Similarly, you can use the rate-shape pps peak-rate burst-packets committed pps

committed-rate burst-packets command in the QoS Policy Out Configuration mode to configure

the committed rate and committed burst size as a measure of pps. Alternatively, you can use the

rate

shape kbps peak-rate burst-KB committed kbps committed-rate burst-KB command to

configure the committed rate and committed burst size as a measure of bytes. If you configure the peak

rate in pps, the peak burst size must also be configured as a measure of number of packets. Similarly, if

you configure the peak rate in Kbps, the peak burst size must also be configured as a measure of bytes.

Configuring Policy-Based Rate Shaping

Configuration of rate shaping for QoS output policies in packets per second (pps) is supported on the

S6000 platform.

You can explicitly specify the rate shaping functionality for QoS output policies as peak rate and

committed rate attributes. You can also configure the peak burst and committed burst sizes. All of these

settings can be configured in Kbps, Mbps, or pps.

To configure the peak and committed rates and burst sizes, perform the following steps:

1. Configure the peak rate and peak burst size in pps in QoS Policy Out Configuration mode.

QOS-POLICY-OUT mode

Dell(config-qos-policy-out)# rate shape pps peak-rate burst-packets

2. Alternatively, configure the peak rate and peak burst size in bytes.

QOS-POLICY-OUT mode

Dell(config-qos-policy-out)# rate shape Kbps peak-rate burst-KB

3. Configure the committed rate and committed burst size in pps.

QOS-POLICY-OUT mode

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