Advantech EKI-7758F, Руководство пользователя

Страница: 85 / 149

71 Chapter3
QoS Configuration
You can configure Qos policy and priority setting, per port priority setting, COS and TOS setting.
QoS Policy and Priority Type
•
Qos Policy:
select the Qos policy rule.
¾ Use an 8,4,2,1 weighted fair queuing scheme: The switch will follow 8:4:2:1 rate to process
priority queue from High to Lowest queue. For example, as the system processes 1 frames of
the lowest queue, 2 frames of the low queue, 4 frames of the middle queue, and 8 frames of
the high queue will be processed at the same time in accordance with the 8,4,2,1 policy rule.
¾ Use a strict priority scheme: Always higher queue will be processed first, except higher queue
is empty.
•
Priority Type:
there are 5 priority type selections available. Disable means no priority type is selected.
•
Port-base:
the port priority will follow the Port-base that you have assigned – High, middle, low, or
lowest.
¾
COS only:
the port priority will only follow the COS priority that you have assigned.
¾
TOS only:
the port priority will only follow the TOS priority that you have assigned.
¾
COS first:
the port priority will follow the COS priority first, and then other priority rule.
¾
TOS first:
the port priority will follow the TOS priority first, and the other priority rule.
•
Click Apply .