Waters Network Systems GSM2108 Operating Manual page 47

Choose the port (1~8) respectively with Priority Class on Per Port Priority function.
Class:
Set High Priority or Low Priority for each port respectively.
Function name:
VLAN Tag Priority
Function description:
In VLAN tag, there are three bits belonging to priority. According to these three bits, we could
arrange eight traffics –0 0 0, 0 0 1, 0 1 0, 0 1 1, 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, if we set VLAN-tagged priority 0 0 0 to high priority
and VLAN-tagged priority 0 0 1 to Low Priority, and then include ports 1, 2, 3 in VLAN 2 that means
the packets that have the value 0 0 0 in VLAN-tagged field and VID equals two from Port 2 and the
packets that have the value 0 0 1 in VLAN-tagged field and VID equals two from Port 3 into the
switch. The two kinds of packets are transmitted for Port 1 until the port results in congestion. The
result is that the packets will be dropped partially from Port 3 because the packets belong to Low
Priority. For the use of VLAN Tag Priority function, use the Configure button.
Waters Network Systems
Figure 5.18 – Per Port Priority
Figure 5.19 – VLAN Tag Priority
User's Manual
GSM-2108/GSM-1008SFP
Page 47