S Layer 2 Managed Switch User Manual
陈泽科技有限公司
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Figure 5-37 Port-based QoS
Port: Port number.
Priority: Two opitions: “Low” or “Highest”, for all packest received at this port.
Default priority Tag: In 802.1 Q Tag VLAN mode with 802.1 p Priority, all packets received at this port will be endowed
with default priority tag.
Illustration:
The forwarding ratio of “Low” and “Highest” is 1:8, the bandwidth will be divided therefore in the port.
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3 ToS-based QoS
Figure 5-38 ToS-based QoS
ToS: Initial ToS filed value for received packets’ IP. “D-Type” is minimum delay, “T-Type” is maximum throughput,
“R-Type” is highest reliability, “M-Type” is manimum value
。
Latter 0-7 indicates the value of first 3 bit of ToS priority.
Priority: options include “Low”
、
“High”
、
“Higher” and “Highest”, their forwarding ratio is 1:2:4:8, the bandwidth will be
divided therefore in the port.
