Installation guide

C HAPTER 11 | Quality of Service
Port-Based Priority
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PORT-BASED PRIORITY
You can specify the default port priority for each port on the switch, a
Quality Control List (which sets the priority for ingress packets based on
detailed criteria), the default tag assigned to egress packets, the queuing
mode, and queue weights.
PARAMETERS
The following parameters are displayed on the Port-Based Priority page:
◆ Port — Port identifier.
◆ Priority — The default priority used when adding a tag to untagged
frames. (Range: 0-7; Default: 0)
The default tag priority applies to untagged frames received on a port
set to accept all frame types (that is, receives both untagged and
tagged frames). This priority does not apply to IEEE 802.1Q VLAN
tagged frames. If the incoming frame is an IEEE 802.1Q VLAN tagged
frame, the IEEE 802.1p User Priority bits will be used.
Inbound frames that do not have VLAN tags are tagged with the input
port’s default ingress tag priority, and then placed in the appropriate
priority queue at the output port. (Note that if the output port is an
untagged member of the associated VLAN, these frames are stripped of
all VLAN tags prior to transmission.)
WEB INTERFACE
To configure global settings for Spanning Tree:
1. Click Configuration, QoS, Port-based Priority.
2. For one or a group of ports, set the default priority value.
3. Click Apply.