Signamax 065-7840 24-Port 10/100/1000BaseT/TX Managed Switch
57
Function name:
VLAN Tag Priority
Function description:
In VLAN tagging, there are 3 bits belonging to priority. According to these 3
bits, we could arrange 8 traffic classes –0 0 0, 0 0 1, 0 1 0, 0 1 0, 1 0 0, 1 0 1,
1 1 0, 1 1 1. We can set High priority or Low priority for each traffic class. For
instance, let us let VLAN-tagged priority 0 0 0 be high priority and VLAN-
tagged priority 0 0 1 be Low Priority, and then assign ports 1, 2, 3 to reside in
VLAN 2. Packets are sent to ports 2 and 3 that have VLAN-tagged Field
assigned as 0 0 0 and VID equals 2 from the port 2 and the packets that have
VLAN-tagged Field appears 0 0 1 and VID equals 2 from the port 3. We let the
two kinds of packets be transmitted to port 1 until the port results in congestion.
The result is that the packets will be dropped partially from port 3, because the
packets that emanate from there are assigned Low Priority. To use the VLAN
Tag Priority function, please press the
<Configure>
button at the right section
to set it in advance.
Fig. 3-16
Parameter description:
Quality of Service (QoS) VLAN Tag Configuration:
Used for setting up the QoS belonging to VLAN operation.
Port:
User can set up the port (1~24) respectively to let the VLAN Tag QoS
function operate on them. If it is desirable to set up all ports at a time, the
user is also allowed to choose “All” in the selection list to simplify the
configuration procedure.
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