SICOM Series CLI Command Manual
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Chapter 6 QoS Configuration
6.1 QoS overview
QoS is the abbreviation of Quality of Service. It is a network ability of providing higher
priority service, including dedicated bandwidth, jitter control, and delay (applied to real time
and interactive traffic conditions), packet loss rate improvement, specified network traffic
under different WAN, LAN and MAN technology, etc , meanwhile to ensure that the priority
provided to each traffic would not prevent other traffic processing.
SICOM series industrial Ethernet switch support two kinds of scheduling modes:
HQ-PREEMPT and WRR. In HQ-PREEMPT, when the highest priority service comes, firstly
transmit the highest priority service. After this transmitting, WRR can schedule other
priority services.
WRR schedules data packets according to users’ setting proportion.
SICOM series switch support TOS/DSCP modes’ selection.
SICOM series switch support setting weight ratio. The default vale is 8:4:2:1 (highest, high,
low, and lowest)
SICOM series switch support 3 kinds of scheduling strategies: based on port (highest
priority), based on TOS/DIFF and based on 802.p priority. The priority relation between
these three strategies is port-based>TOS/DIFF-based>802.1p-based.
SICOM series switch support the remapping of 802.1p priority, IPTOS priority, DSCP priority
with queues.
6.2 QoS configuration
6.2.1 Enable/disable QoS
User can enable and disable QoS function by command line and other QOS configurations can
be set after this configuration.
Enable QoS
KYLAND(config)# qos enable
Disable QOS
KYLAND(config)# qos disable