ZyXEL Communications ES-1552 - V1.12, Руководство пользователя

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Chapter 11 QoS
ES-1552 User’s Guide
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11.2 QoS Enhancement
You can configure the switch to prioritize traffic even if the incoming packets are not marked
with IEEE 802.1p priority tags or change the existing priority tags based on the criteria you
select. The switch allows you to choose one of the following methods for assigning priority to
incoming packets on the switch:
Port Based QoS - Assign priority to packets based on the incoming port on the switch. See
Section 11.4.1 on page 74 .
DSCP Based QoS - Assign priority to packets based on their Differentiated Services Code
Points (DSCPs). See Section 11.4.2 on page 75 .
ToS Based QoS - Assign priority to packets based on their Type of Service (ToS) tagging. See
Section 11.4.5 on page 76 .
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Advanced QoS methods only affect the internal priority queue mapping for the
switch. The switch does not modify the IEEE 802.1p value for the egress
frames.
You can choose one of these ways to alter the way incoming packets are prioritized or you can
choose not to use any QoS enhancement setting on the switch.
11.3 Configuring QoS
Use the QoS Setting screen to specify a queuing method and configure queue weights for the
switch. Click QoS in the navigation panel to view the following screen.
Figure 36 QoS Setting