Transition Networks SISTM10XX-162-LR - Manual (Page 42)

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QoS Configuration
Configure Qos setting of the every port
• Oos Policy: Select the Qos policy rule
Using the 8,4,2,1 weight fair queue scheme: The switch will follow 8:4:2:1 rate to
process priority queue from Hi to lowest queue. For example: the system will
process 8 high queue packets, 4 middle queue packets, 2 low queue packets, and
the one lowest queue packets at the same time
Use the strict priority scheme: The higher queue will always be process first,
except higher queue is empty
• Priority Type: Every port has 5 priority type selections
Port-base: The port priority will follow the default port priority that user have
assigned – High, middle, low, or lowest
COS only: The port priority will only follow the COS priority that user have
assigned
TOS only: The port priority will only follow the TOS priority that user have assigned
COS first: The port priority will follow the COS priority first, and then other priority
rule
TOS first: The port priority will follow the TOS priority first, and the other priority rule
• COS priority: Set the COS priority level 0~7
• TOS priority: The system provides 0~63 TOS priority level. Each level has 4 types of
priority – high, mid, low, and lowest. The default value is “Lowest” priority for each level.
When the IP packet is received, the system will check the TOS level value in the IP packet
has received. For example: user set the TOS level 25 is high. The port 1 is following the
TOS priority policy only. When the packet received by port 1, the system will check the TOS
value of the received IP packet. If the TOS value of received IP packet is 25(priority = high),
and then the packet priority will have highest priority.
[NOTE] QoS and Rate control cannot be existed at the same time.