Administrator Guide

Version Description
9.5(1.0) Added support for packets-per-second and committed rate.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.2.1.0 Added the kbps option on the C-Series, E-Series, and S-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.1.1.1 Introduced on the E-Series.
Usage
Information
You must configure the peak rate and peak burst size using the same value: kilobits or packets per
second. Similarly, you must configure the committed rate and committed burst size with the same
measurement.
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.
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.
Related
Commands
qos-policy-output — creates a QoS output policy.
rate police — specifies traffic policing on the selected interface.
service-class buffer shared-threshold-weight
Create a service class and associate the threshold weight of the shared buffer with each of the queues per port in the egress
direction. A global buffer pool that is a shared buffer pool accessed by multiple queues when the minimum guaranteed buffers
for the queue are consumed can be configured on the switch.
C9000 Series
Syntax
[No] Service-class buffer shared-threshold-weight {[queue0 number] ||
[queue1 number] || [queue2 number] || [queue3 number] || [queue4 number] ||
[queue5 number] || [queue6 number] || [queue7 number]}
Parameters
buffer Define the shared buffer settings
shared-
threshold-weight
Specify the weight of a queue for the shared buffer space
queue 0 to queue
7
Specify the queue number to which the WRED parameters apply
number Enter a weight for the queue on the shared buffer as a number in the range of 1 to
11.
Default The default threshold weight on the shared buffer for each queue is 9. Therefore, each queue can
consume up to 66.67 percent of available shared buffer by default.
Command Modes INTERFACE mode
Quality of Service (QoS) 1433