Planet Technology FT-90X FT-906A20 - Manual (Page 24)

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• First In First Out
• Strict Priority
• Weighted Round Robin
• WRR Priority
(High: Low)
This field is available when choose Weighted Round Robin as Class of Service
schedule. It indicates that traffic output ration of high priority and low priority. The
possible field values are:
• 1:1
• 2:1
• 4:1
• 8:1
• LLR Mode To enable or disable the LLR (Link Loss Return) function of the device.
The fiber ports of the Web Smart Media Converter have been designed with an
LLR function for troubleshooting a remote connection. Refer to LLR description at
next page for more detail.
The default value is Enable.
■ Broadcast Storm Control
To prevent the broadcast storm, the converter implements a broadcast storm control mechanism. When this
function is enabled, a port begins to drop incoming broadcast packets if the received broadcast packet counts reach
the threshold defined in the field.
The screen in Figure 4-9 appears.
Figure 4-9 Broadcast Storm Control Configuration screen
■ Class of Services and WRR priority
The converter implements two levels of priority queues, high priority and low priority. The priority for each packet is
based on 802.1Q VLAN tag scheme. Each incoming packet is mapped to either a high priority queue or a low
priority queue. When no CoS function is enabled, the first-in/ first-out forwarding method is used. The output
schedule mode and weight function for the ratio of high/low priorities is defined in the Class of Service field.