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2.6.10 QoS command mode
Network traffic is always unpredictable and the only basic assurance that can be offered is
the best effort traffic delivery. To overcome this challenge, Quality of Service (QoS) is
applied throughout the network. This ensures that network traffic is prioritized according to
specified criteria and receives preferential treatments.
QoS enables you to assign various grades of network service to different types of traffic,
such as multi-media, video, protocol-specific, time critical, and file-backup traffic. Enter the
qos command in Configuration mode. Then, the qos mode shows as follows:
SWH(config)# qos
SWH(config-qos)#
Command
Purpose & Description
Usage
=================== ===========================
=============================
class Set Default Class class <port_list> <queue>
mode Set Mode mode <port_list> <type>
weight Set Weight weight <port_list> <weight>
pri-map Set 802.1p to Queue pri-map <pri_list> <queue>
dscp-map Set DSCP to Queue dscp-map <dscp_list> <queue>
rate-limit Enter Rate Limit Cmd. Mode rate-limit
exit Exit from current mode exit
show Show QoS Settings show
SWH(config-qos)#
Prompt
Command & Parameter
Description
class <port_list> <queue>
Configure the default class for each port.
<port_list>: Specify a port number or multiple
port numbers with the format 5, 7, 8, 9, 12 or
5, 7-9, 12.
<queue>: 0~7
For example:
SWH(config-qos)# class 1-5,10 4
mode <port_list> <weighted |
strict>
To specify “strict” or “weighted” to ports.
<port_list>: Specify a port number or multiple
port numbers with the format 5, 7, 8, 9, 12 or
5, 7-9, 12.
<weighted | strict>: “Strict” indicates that
services to the egress queues are offered in
the sequential order and all traffic with higher
priority queues are transmitted first before
lower priority queues are serviced.
“Weighted” Round-Robin shares bandwidth
at the egress ports by using scheduling
weights 1, 2, 3, 4, 5, 6, 7, 8 for queues 1
through 8 respectively.
For example:
SWH(config-qos)# mode 1-4,8,10 strict
SWH(config-qos)#
weight <port_list> <weight>
To specify queuing weights for ports that are
configured as weighted.
<port_list>: Specify a port number or multiple
port numbers with the format 5, 7, 8, 9, 12 or
5, 7-9, 12.
<weight>: Specify the weight from 1~8 for the
