Cisco Systems SG50028PK9NA Mapping CoS/802.1p to a Queue

Quality of Service
Configuring QoS - General
495 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
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To select the priority method and enter WRR data.
STEP 1 Click Quality of Service > General > Queue.
STEP 2 Enter the pa rameters.
•Queue—Displays the queue number.
•Scheduling Method: Select one of the following options:
-
Strict Priority —Traffic scheduling for the selected queue and all higher
queues is based strictly on the queue priority.
-
WRR —Traffic scheduling for the selected queue is based on WRR. The
period time is divided between the WRR queues that are not empty,
meaning they have descriptors to egress. This happens only if strict
priority queues are empty.
-
WRR Weight —If WRR is selected, enter the WRR weight assigned to the
queue.
-
% of WRR Bandwidth —Displays the amount of bandwidth assigned to
the queue. These values represent the percent of the WRR weight.
STEP 3 Click Apply. The queues are configured, and the Running Configuration file is
updated.
Mapping CoS/802.1p to a Queue
The CoS/802.1p to Queue page maps 802.1p priorities to egress queues. The
CoS/802.1p to Queue Table determines the egress queues of the incoming
packets based on the 802.1p priority in their VLAN Tags. For incoming untagged
packets, the 802.1p priority is the default CoS/802.1p priority assigned to the
ingress ports.
The following table describes the default mapping when there are 4 queues:
802.1p
Values
(0-7, 7 being
the highest)
Queue
(4 queues 1-
4, 4 being the
highest
priority)
Notes
0 1 Background