QoS Application Guide
features allow you to allocate network resources to mission-critical applications
at the expense of applications that are less sensitive to such factors as time delays or network
congestion. You can configure your network to prioritize specific types of traffic, ensuring that each
type receives the appropriate QoS level.
SP/SPWRR
The KGS can be configured to have 8 output
queues (Q0~Q7) per port, into which each packet is
placed. Q0 is the highest priority Queue. Each packet’s 802.1p priority determines its CoS queue. You
need to bind
priority/queue mapping profile to each port, for every VLAN priority need assign a
traffic descriptor for it. The traffic descriptor defines the shape parameter on every VLAN priority for
Ethernet interface. Currently KGS supports Strict Priority and SP+WRR (Weighted Round Robin)
scheduling methods on each port. Please find the detail reference on ISW user manual.
Default Priority and Queue mapping is as follows:
Priority0
Priority1
Priority2
Priority3
Priority4
Priority5
Priority6
Priority7
Queue0
Queue1
Queue2
Queue3
Queue4
Queue5
Queue6
Queue7
SPQ
SPQ
SPQ
SPQ
SPQ
SPQ
SPQ
SPQ
Application Examples
Following we provide several examples for various
combinations and you can configure QoS using
the web-based management system, CLI or
SNMP (Simple Network Management Protocol)
Example 1: SPQ without Shaping (Default profile)
We send 2 Streams (Stream0, Stream1) from PORT-1 to PORT-2. Both 2 Streams each have 100Mbps.
Stream0 includes
Priority0, Stream1 includes VLAN Priority7. Set PORT-2 link speed to 100Mbps.
Expected Result
We expect PORT-2 only can receive 100Mbps of Stream1, and Stream0 will be discarded. This case will
help you to understand how SPQ works on the ISW.
Figure 12: Gigabit port VLAN Priority & Queue Mapping
ISW Application Guides
QoS Application Guide
ISW Series Managed Industrial Ethernet Switch Hardware Installation & User Guide
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